Submission #1289421

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289421		lopkus	Fish 3 (JOI24_fish3)	C++20	0 / 100	2096 ms	5124 KiB

Main

#include <bits/stdc++.h>

#define int int64_t

signed main() {
  int n, d;
  std::cin >> n >> d;
  std::vector<int> a(n + 1);
  for(int i = 1; i <= n; i++) {
    std::cin >> a[i];
  }
  int q;
  std::cin >> q;
  while(q--) {
    int l, r;
    std::cin >> l >> r;
    if(is_sorted(a.begin() + l, a.begin() + r + 1)) {
      std::cout << 0 << "\n";
      continue;
    }
    std::vector<int> f = a;
    int can = 1;
    int ans = 0;
    for(int i = r - 1; i >= l; i--) {
      while(f[i] > f[i + 1]) {
        f[i] -= d;
        ans += 1;
      }
      if(f[i] < 0) {
        can = 0;
        break;
      }
    }
    std::cout << (can == 1 ? ans : - 1) << "\n";
  }
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36