Submission #654756

#	Time	Username	Problem	Language	Result	Execution time	Memory
654756		gun_gan	Self Study (JOI22_ho_t2)	C++17	100 / 100	347 ms	10880 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];
      for(int i = 0; i < n; i++) a[i] = max(a[i], b[i]);
 
      auto ok = [&](ll x) -> bool {
            ll left = n * m; 
            for(int i = 0; i < n; i++) {
                  left -= min(m, (x + a[i] - 1) / a[i]);
                  if(x - a[i] * m > 0) left -= (x - a[i] * m + b[i] - 1) / b[i]; 
                  if(left < 0) return 0;
            }
 
            return 1;
      };
 
      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: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9