Submission #654751

#	Time	Username	Problem	Language	Result	Execution time	Memory
654751		gun_gan	Self Study (JOI22_ho_t2)	C++17	54 / 100	349 ms	11464 KiB

Main

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

int main() {
      cin.tie(0); ios_base::sync_with_stdio(0);

      ll n, m;
      cin >> n >> m;

      vector<ll> a(n), b(n);
      for(int i = 0; i < n; i++) cin >> a[i];
      for(int i = 0; i < n; i++) cin >> b[i];

      auto ok = [&](ll x) -> bool {
            ll left = 0;
            for(int i = 0; i < n; i++) {
                  ll z = (x + max(a[i], b[i]) - 1) / max(a[i], b[i]);
                  if(z < m) {
                        left += m - z; 
                  } else {
                        left -= (x - max(a[i], b[i]) * m + b[i] - 1) / b[i];
                  }
                  if(-left > n * m) return 0;
            }

            return left >= 0;
      };

      ll l = 0, r = 2e18, ans = 0;
      while(l <= r) {
            ll mid = (l + r) / 2;
            if(ok(mid)) {
                  l = mid + 1, ans = mid;
            } else {
                  r = mid - 1;
            }
      }

      cout << ans << '\n';

}

• Subtask 1: 0 / 10
• Subtask 2: 25 / 25
• Subtask 3: 0 / 27
• Subtask 4: 29 / 29
• Subtask 5: 0 / 9