Submission #786910

#	Time	Username	Problem	Language	Result	Execution time	Memory
786910		WLZ	Self Study (JOI22_ho_t2)	C++17	100 / 100	372 ms	13840 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  vector<int> a(n), b(n);
  for (int i = 0; i < n; i++) cin >> a[i];
  for (int i = 0; i < n; i++) cin >> b[i];
  for (int i = 0; i < n; i++) a[i] = max(a[i], b[i]);
 
  auto check = [&](__int128_t k) {
    vector<__int128_t> left(n, k);
    __int128_t weeks_left = (__int128_t) n * m;
    for (int i = 0; i < n; i++) {
      __int128_t div = min((__int128_t) m, (k + a[i] - 1) / a[i]);
      left[i] = max((__int128_t) 0, left[i] - a[i] * div);
      weeks_left -= div;
    }
    for (int i = 0; i < n; i++) weeks_left -= (left[i] + b[i] - 1) / b[i];
    return weeks_left >= 0;
  };
 
  __int128_t lo = 0, hi = (__int128_t) 2e18;
  while (lo < hi) {
    __int128_t mid = (lo + hi + 1) / 2;
    if (check(mid)) lo = mid;
    else hi = mid - 1;
  }
  cout << (long long) lo << '\n';
  return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9