Submission #536783

#	Time	Username	Problem	Language	Result	Execution time	Memory
536783		xp875	Self Study (JOI22_ho_t2)	C++17	10 / 100	174 ms	5000 KiB

Main

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

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0); 
	
	ll n, m;
	cin >> n >> m;
	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];
	if(m==1) {
		ll ans = (ll)1<<60;
		for(int i=0;i<n; i++) {
			ans = min(ans, max(a[i], b[i]));
		}
		cout << ans;
		return 0;
	}
	
	ll lo = 0, hi = (ll)1<<60;
	while(hi-lo>1) {
		ll x = (lo+hi)/2;
		ll ans = 0;
		for(int i=0; i<n; i++) {
			ll a1 = (x+b[i]-1)/b[i];
			ll a2 = (x+a[i]-1)/a[i];
			if(a2 > m) a2 = m + (x-a[i]*m+b[i]-1)/b[i];
			ans += min(a1, a2);
		}
		if(ans <= n*m) lo = x;
		else hi = x;
		
	}
	cout << lo;
	
}

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