Submission #878055

#	Time	Username	Problem	Language	Result	Execution time	Memory
878055		NeroZein	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	100 / 100	442 ms	25604 KiB

worst_reporter3

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

#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, q;
  cin >> n >> q;
  vector<long long> a(n); 
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  for (int i = 1; i < n; ++i) {
    if (a[i] < a[i - 1]) {
      a[i] = a[i - 1];
    } else {
      a[i] = ((a[i] + a[i - 1] - 1) / a[i - 1]) * a[i - 1];
    }
  }
  while (q--) {
    int t, l, r;
    cin >> t >> l >> r;
    int ans = t >= l && t <= r;
    int lo = -1, hi = n - 1; 
    while (lo < hi) {
      int mid = (lo + hi + 1) / 2;
      long long p = (long long) t / a[mid] * a[mid] - mid - 1; 
      if (p >= l) {
        lo = mid;
      } else {
        hi = mid - 1; 
      }
    }
    int lo2 = 0, hi2 = n;
    while (lo2 < hi2) {
      int mid = (lo2 + hi2) / 2; 
      long long p = (long long) t / a[mid] * a[mid] - mid - 1; 
      if (p <= r) {
        hi2 = mid; 
      } else {
        lo2 = mid + 1; 
      }
    }
    cout << ans + (hi - lo2 + 1) << '\n'; 
  }
  return 0;
}

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