Submission #982969

#	Time	Username	Problem	Language	Result	Execution time	Memory
982969		NeroZein	Fish 3 (JOI24_fish3)	C++17	9 / 100	2101 ms	5904 KiB

Main

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

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

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  long long d;
  cin >> n >> d;
  vector<long long> c(n);
  for (int i = 0; i < n; ++i) {
    cin >> c[i];
  }
  int q;
  cin >> q;
  while (q--) {
    int l, r;
    cin >> l >> r;
    --l, --r;
    bool ok = true;
    long long md = 0;
    vector<long long> b = c; 
    for (int i = l; i <= r; ++i) {
      b[i] -= md;
      if (b[i] < 0) {
        ok = false;
        break; 
      }
      long long tmp = b[i] % d;
      b[i] -= tmp;
      md += tmp; 
    }
    if (!ok) {
      cout << -1 << '\n';
      continue;
    }
    long long mn = LLONG_MAX;
    for (int i = r; i >= l; --i) {
      mn = min(mn, b[i]);
      b[i] -= mn;
    }
    long long ans = 0; 
    for (int i = l; i <= r; ++i) {
      ans += b[i] / d; 
    }
    cout << ans << '\n';
  }
  return 0;
}

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