Submission #999174

#	Time	Username	Problem	Language	Result	Execution time	Memory
999174		ZeroCool	Self Study (JOI22_ho_t2)	C++14	100 / 100	89 ms	11348 KiB

Main

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

#define int long long

#define ll long long
#define ar array
#define ld long double

const int N = 2000, MOD = 1e9 + 7, INF = 1e17;


signed main(){ios::sync_with_stdio(false);cin.tie(0);	
	int n, m;
	cin>>n>>m;
	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], A[i] = max(A[i], B[i]);
	
	auto check = [&](int t){
		int cnt = 0;
		for(int i = 0;i<n;i++){
			if(A[i] * m >= t)cnt += (t - 1) / A[i] + 1;
			else cnt += (m + 1 + (t - m * A[i] - 1) / B[i]);
			if(cnt > n * m)break;
		}
		return cnt <= n * m;
	};
	
	int lo = 0;
	int hi = 1e18;
	int ans = 0;
	while(lo <= hi){
		int mid = (lo + hi) / 2;
		if(check(mid)){
			ans = mid;
			lo = mid + 1;
		}else hi = mid - 1;
	}
	cout<<ans;
}

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