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https://git.sb/baoshuo/OI-codes.git
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244 lines
9.5 KiB
C++
244 lines
9.5 KiB
C++
#include <bits/stdc++.h>
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using namespace std;
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class BigInt {
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public:
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int sign;
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std::string s;
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BigInt() {
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s = "";
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}
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BigInt(std::string x) {
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*this = x;
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}
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BigInt(int x) {
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*this = std::to_string(x);
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}
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BigInt negative() {
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BigInt x = *this;
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x.sign *= -1;
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return x;
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}
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BigInt normalize(int newSign) {
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for (int a = s.size() - 1; a > 0 && s[a] == '0'; a--) {
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s.erase(s.begin() + a);
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}
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sign = (s.size() == 1 && s[0] == '0' ? 1 : newSign);
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return *this;
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}
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void operator=(std::string x) {
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int newSign = (x[0] == '-' ? -1 : 1);
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s = (newSign == -1 ? x.substr(1) : x);
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std::reverse(s.begin(), s.end());
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this->normalize(newSign);
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}
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bool operator==(const BigInt& x) const {
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return (s == x.s && sign == x.sign);
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}
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bool operator<(const BigInt& x) const {
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if (sign != x.sign) {
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return sign < x.sign;
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}
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if (s.size() != x.s.size()) {
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return (sign == 1 ? s.size() < x.s.size() : s.size() > x.s.size());
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}
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for (int a = s.size() - 1; a >= 0; a--) {
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if (s[a] != x.s[a]) {
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return (sign == 1 ? s[a] < x.s[a] : s[a] > x.s[a]);
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}
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}
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return false;
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}
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bool operator<=(const BigInt& x) const {
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return (*this < x || *this == x);
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}
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bool operator>(const BigInt& x) const {
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return (!(*this < x) && !(*this == x));
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}
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bool operator>=(const BigInt& x) const {
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return (*this > x || *this == x);
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}
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BigInt operator+(BigInt x) {
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BigInt curr = *this;
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if (curr.sign != x.sign) return curr - x.negative();
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BigInt res;
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for (int a = 0, carry = 0; a < s.size() || a < x.s.size() || carry; a++) {
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carry += (a < curr.s.size() ? curr.s[a] - '0' : 0) + (a < x.s.size() ? x.s[a] - '0' : 0);
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res.s += (carry % 10 + '0');
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carry /= 10;
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}
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return res.normalize(sign);
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}
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BigInt operator-(BigInt x) {
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BigInt curr = *this;
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if (curr.sign != x.sign) return curr + x.negative();
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int realSign = curr.sign;
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curr.sign = x.sign = 1;
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if (curr < x) return ((x - curr).negative()).normalize(-realSign);
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BigInt res;
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for (int a = 0, borrow = 0; a < s.size(); a++) {
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borrow = (curr.s[a] - borrow - (a < x.s.size() ? x.s[a] : '0'));
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res.s += (borrow >= 0 ? borrow + '0' : borrow + '0' + 10);
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borrow = (borrow >= 0 ? 0 : 1);
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}
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return res.normalize(realSign);
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}
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BigInt operator*(BigInt x) {
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BigInt res("0");
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for (int a = 0, b = s[a] - '0'; a < s.size(); a++, b = s[a] - '0') {
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while (b--) res = (res + x);
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x.s.insert(x.s.begin(), '0');
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}
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return res.normalize(sign * x.sign);
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}
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BigInt operator/(BigInt x) {
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if (x.s.size() == 1 && x.s[0] == '0') {
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x.s[0] /= (x.s[0] - '0');
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}
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BigInt temp("0"), res;
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for (int a = 0; a < s.size(); a++) res.s += "0";
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int newSign = sign * x.sign;
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x.sign = 1;
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for (int a = s.size() - 1; a >= 0; a--) {
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temp.s.insert(temp.s.begin(), '0');
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temp = temp + s.substr(a, 1);
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while (!(temp < x)) {
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temp = temp - x;
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res.s[a]++;
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}
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}
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return res.normalize(newSign);
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}
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BigInt operator%(BigInt x) {
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if (x.s.size() == 1 && x.s[0] == '0') {
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x.s[0] /= (x.s[0] - '0');
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}
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BigInt res("0");
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x.sign = 1;
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for (int a = s.size() - 1; a >= 0; a--) {
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res.s.insert(res.s.begin(), '0');
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res = res + s.substr(a, 1);
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while (!(res < x)) res = res - x;
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}
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return res.normalize(sign);
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}
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std::string toString() const {
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std::string ret = s;
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std::reverse(ret.begin(), ret.end());
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return (sign == -1 ? "-" : "") + ret;
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}
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BigInt toBase10(int base) {
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BigInt exp(1), res("0"), BASE(base);
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for (int a = 0; a < s.size(); a++) {
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int curr = (s[a] < '0' || s[a] > '9' ? (toupper(s[a]) - 'A' + 10) : (s[a] - '0'));
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res = res + (exp * BigInt(curr));
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exp = exp * BASE;
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}
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return res.normalize(sign);
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}
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BigInt toBase10(int base, BigInt mod) {
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BigInt exp(1), res("0"), BASE(base);
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for (int a = 0; a < s.size(); a++) {
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int curr = (s[a] < '0' || s[a] > '9' ? (toupper(s[a]) - 'A' + 10) : (s[a] - '0'));
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res = (res + ((exp * BigInt(curr) % mod)) % mod);
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exp = ((exp * BASE) % mod);
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}
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return res.normalize(sign);
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}
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std::string convertToBase(int base) {
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BigInt ZERO(0), BASE(base), x = *this;
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std::string modes = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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if (x == ZERO) {
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return "0";
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}
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std::string res = "";
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while (x > ZERO) {
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BigInt mod = x % BASE;
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x = x - mod;
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if (x > ZERO) x = x / BASE;
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res = modes[stoi(mod.toString())] + res;
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}
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return res;
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}
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BigInt toBase(int base) {
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return BigInt(this->convertToBase(base));
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}
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friend std::istream& operator>>(std::istream& is, BigInt& x) {
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std::string s;
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is >> s;
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x = BigInt(s);
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return is;
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}
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friend std::ostream& operator<<(std::ostream& os, const BigInt& x) {
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os << x.toString();
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return os;
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}
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};
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const int mod = 9987;
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int n, m, x, y, z;
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BigInt dist[1005];
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vector<pair<int, BigInt>> g[1005];
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bool vis[1005];
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void dijkstra() {
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for (int i = 1; i <= n; i++) {
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dist[i] = BigInt(string("9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"));
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}
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priority_queue<pair<BigInt, int>, vector<pair<BigInt, int>>, greater<pair<BigInt, int>>> q;
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dist[1] = BigInt(1);
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q.push(make_pair(1, 1));
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while (!q.empty()) {
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auto t = q.top();
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q.pop();
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if (vis[t.second]) continue;
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for (auto i : g[t.second]) {
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if (dist[i.first] > t.first * i.second) {
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dist[i.first] = t.first * i.second;
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q.push(make_pair(dist[i.first], i.first));
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}
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}
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vis[t.second] = true;
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}
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}
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int main() {
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#ifndef ONLINE_JUDGE
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freopen64("data/P2384_11.in", "r", stdin);
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#endif
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cin >> n >> m;
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for (int i = 1; i <= m; i++) {
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cin >> x >> y >> z;
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g[x].push_back(make_pair(y, BigInt(z)));
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}
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dijkstra();
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cout << dist[n] % mod << endl;
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return 0;
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}
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