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BZOJ/3813/3813.cpp
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89
BZOJ/3813/3813.cpp
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#include <iostream>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 1e5 + 5;
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const int mod = 19961993;
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const int primes[]{0, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281};
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int n, a[N], c[61][N], p[61][N];
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int lowbit(int x) {
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return x & -x;
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}
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void add(int* c, int x, int y) {
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for (; x <= 100000; x += lowbit(x)) c[x] += y;
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}
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int sum(int* c, int x) {
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int res = 0;
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for (; x; x -= lowbit(x)) res += c[x];
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return res;
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n;
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for (int i = 1; i <= 100000; i++) {
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a[i] = 3;
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add(c[2], i, 1);
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}
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for (int i = 1; i <= 60; i++) {
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p[i][0] = 1;
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for (int j = 1; j <= 100000; j++) {
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p[i][j] = static_cast<long long>(p[i][j - 1]) * (j > 1 ? primes[i] : (primes[i] - 1)) % mod;
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}
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}
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for (int i = 1, op, x, y; i <= n; i++) {
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cin >> op >> x >> y;
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if (op == 0) {
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int ans = 1;
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for (int j = 1; j <= 60; j++) {
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ans = static_cast<long long>(ans) * p[j][sum(c[j], y) - sum(c[j], x - 1)] % mod;
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}
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cout << ans << endl;
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} else { // op == 1
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for (int i = 1; i <= 60; i++) {
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if (a[x] % primes[i] == 0) {
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int cnt = 0, t = a[x];
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while (t % primes[i] == 0) {
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t /= primes[i];
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cnt++;
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}
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add(c[i], x, -cnt);
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}
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}
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a[x] = y;
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for (int i = 1; i <= 60; i++) {
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if (a[x] % primes[i] == 0) {
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int cnt = 0, t = a[x];
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while (t % primes[i] == 0) {
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t /= primes[i];
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cnt++;
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}
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add(c[i], x, cnt);
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}
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}
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}
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}
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return 0;
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}
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