Submission #1148440

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148440		Nomio	Self Study (JOI22_ho_t2)	C++20	100 / 100	86 ms	4936 KiB

Main

#include<bits/stdc++.h>
using namespace std;
using ll = unsigned long long;
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int 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];
		a[i] = max(b[i], a[i]);
	}
	ll l = 0, r = 1e18 + 1;
	while(l < r) {
		ll mid = (l + r + 1) / 2;
		ll cnt = 0;
		bool w = 1;
		for(int i = 0; i < n; i++) {
			if(mid <= a[i] * m) cnt += mid / a[i] + min(1ULL, mid % a[i]);
			else cnt += (mid - a[i] * m) / b[i] + min(1ULL, (mid - a[i] * m) % b[i]) + m; 
			if(cnt > 1ULL * n * m) {
				w = 0;
				break;
			}
		}
		if(w && cnt <= 1ULL * n * m) l = mid;
		else r = mid - 1;
	}
	cout << l << '\n';
	return 0;
}

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