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68
S2OJ/1663/1663.cpp
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68
S2OJ/1663/1663.cpp
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#include <iostream>
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#include <cmath>
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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 = 998244853;
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int t, n, p[N], p1[N];
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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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p1[0] = 1;
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for (int i = 1; i <= 100000; i++) {
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p[i] = (static_cast<long long>(p[i - 1]) * 10 % mod + 8) % mod;
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p1[i] = static_cast<long long>(p1[i - 1]) * 10 % mod;
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}
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cin >> t;
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while (t--) {
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cin >> n;
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int l = std::ceil(1.0 * n / 7);
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if (n == 1) {
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cout << -1 << endl;
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} else if (n == 2) {
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cout << 1 << endl;
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} else if (n == 3) {
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cout << 7 << endl;
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} else if (n == 4) {
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cout << 4 << endl;
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} else if (n == 5) {
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cout << 2 << endl;
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} else if (n == 6) {
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cout << 0 << endl;
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} else if (n == 7) {
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cout << 8 << endl;
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} else if (n == 8) {
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cout << 10 << endl;
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} else if (n == 9) {
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cout << 18 << endl;
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} else if (n == 10) {
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cout << 22 << endl;
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} else if (n % 7 == 0) {
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cout << p[l] << endl;
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} else if (n % 7 == 1) {
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cout << (static_cast<long long>(l - 2 > 0 ? p[l - 2] : 0) + static_cast<long long>(p1[l - 1])) % mod << endl;
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} else if (n % 7 == 2) {
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cout << (static_cast<long long>(l - 1 > 0 ? p[l - 1] : 0) + static_cast<long long>(p1[l - 1])) % mod << endl;
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} else if (n % 7 == 3) {
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cout << (static_cast<long long>(l - 3 > 0 ? p[l - 3] : 0) + static_cast<long long>(p1[l - 1]) * 2 % mod) % mod << endl;
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} else if (n % 7 == 4) {
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cout << (static_cast<long long>(l - 2 > 0 ? p[l - 2] : 0) + static_cast<long long>(p1[l - 1]) * 2 % mod) % mod << endl;
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} else if (n % 7 == 5) {
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cout << (static_cast<long long>(l - 1 > 0 ? p[l - 1] : 0) + static_cast<long long>(p1[l - 1]) * 2 % mod) % mod << endl;
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} else { // n % 7 == 6
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cout << (static_cast<long long>(l - 1 > 0 ? p[l - 1] : 0) + static_cast<long long>(p1[l - 1]) * 6 % mod) % mod << endl;
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}
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}
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return 0;
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}
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