Submission #886968

#	Time	Username	Problem	Language	Result	Execution time	Memory
886968		stefanneagu	Self Study (JOI22_ho_t2)	C++17	100 / 100	206 ms	11384 KiB

Main

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

const int nmax = 3e5 + 1;

int a[nmax], b[nmax], n, m;

bool check(int x) {
  int day = 0;
  for(int i = 1; i <= n; i++){
    if(x <= a[i] * m) day += (x + a[i] - 1) / a[i];
    else day += m + (x - a[i] * m + b[i] - 1) / b[i];
    if(day > n * m) return 0;
  }
  return 1;
}

int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  cin >> n >> m;
  for(int i = 1; i <= n; i ++) {
    cin >> a[i];
  }
  for(int i = 1; i <= n; i ++) {
    cin >> b[i];
    a[i] = max(a[i], b[i]);
  }
  int l = 0, r = 1e18, ans = 0;
  while(l <= r) {
    int mid = (l + r) / 2;
    if(check(mid) == true) {
      ans = mid;
      l = mid + 1;
    } else {
      r = mid - 1;
    }
  }
  cout << ans;
  return 0;
}

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