Submission #891521

#	Time	Username	Problem	Language	Result	Execution time	Memory
891521		Sharky	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	100 / 100	477 ms	25820 KiB

worst_reporter3

#include <bits/stdc++.h>
using namespace std;

#define int long long

int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n, q;
    cin >> n >> q;
    vector<int> d(n + 1, 1);
    for (int i = 1; i <= n; i++) cin >> d[i];
    for (int i = 1; i <= n; i++) {
        if (d[i] < d[i - 1]) d[i] = d[i - 1];
        else d[i] = ((d[i] + d[i - 1] - 1) / d[i - 1]) * d[i - 1];
    }
    while (q--) {
        int T, L, R, l = 1, r = n, idL = 0, idR = 0;
        cin >> T >> L >> R;
        // min index s.t. 
        while (l < r) {
            int mid = (l + r) >> 1;
            int pos = (-mid + (T / d[mid]) * d[mid]);
            if (pos <= R) r = mid;
            else l = mid + 1;
        }
        if (-l + (T / d[l]) * d[l] <= R) idL = l;
        l = 1, r = n;
        while (l < r) {
            int mid = (l + r + 1) >> 1;
            int pos = (-mid + (T / d[mid]) * d[mid]);
            if (pos >= L) l = mid;
            else r = mid - 1;
        }
        if (-l + (T / d[l]) * d[l] >= L) idR = l;
        int add = 0;
        if (L <= T && T <= R) add++;
        // cout << idL << ' ' << idR << '\n';
        if (idL != 0 && idR != 0) cout << (idR - idL + 1) + add << '\n';
        else cout << add << "\n";
    }
}

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81