Submission #1018830

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018830		vjudge1	Self Study (JOI22_ho_t2)	C++17	100 / 100	122 ms	2904 KiB

Main

#include "bits/stdc++.h"
using namespace std;
#define ar array
typedef long long ll;
signed main() {
  ios::sync_with_stdio(0); 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];
  }
  auto check = [&](ll p){
    ll t = 0;
    for(int i=0;i<n;i++){
      if(b[i] > a[i]){
        ll b_ = (p + b[i] - 1) / b[i];
        t += b_;
      } else {
        if(a[i] * 1ll * m >= p){
          ll a_ = (p + a[i] - 1) / a[i];
          t += a_;
        } else {
          ll a_ = m;
          ll b_ = (p - a[i] * 1ll * a_ + b[i] - 1) / b[i];
          t += a_ + b_;
        }
      }
      if(t > n * 1ll * m) return false;
    }
    if(t <= n * 1ll * m) return true;
    else return false;
  };
  ll l = 1, r = 1e18 + 1;
  while(r - l > 1){
    ll m = (l + r) >> 1;
    if(check(m)) l = m;
    else r = m;
  }
  if(check(r)) cout<<r<<"\n";
  else cout<<l<<"\n";
}

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