Submission #729267

#	Time	Username	Problem	Language	Result	Execution time	Memory
729267		tch1cherin	Self Study (JOI22_ho_t2)	C++17	100 / 100	260 ms	8580 KiB

Main

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

const long long MAX_ANSWER = 2e18 + 5;

void solve() {
  int n, m;
  cin >> n >> m;
  vector<int> a(n), b(n);
  for (int &v : a) {
    cin >> v;
  }
  for (int &v : b) {
    cin >> v;
  }
  long long l = -1, r = MAX_ANSWER;
  while (r > l + 1) {
    long long mid = (l + r) / 2;
    long long req = 0;
    for (int i = 0; i < n; i++) {
      if (a[i] <= b[i]) {
        req += 1ll * (mid + b[i] - 1) / b[i];   
      } else {
        if (1ll * a[i] * m < mid) {
          req += m + 1ll * (mid - 1ll * a[i] * m + b[i] - 1) / b[i];  
        } else {
          req += 1ll * (mid + a[i] - 1) / a[i];
        }
      }
      req = min(req, MAX_ANSWER); 
    }
    if (req > 1ll * n * m) {
      r = mid;
    } else {
      l = mid;
    }
  }
  cout << l << "\n";
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  solve();
}

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