Submission #923443

#	Time	Username	Problem	Language	Result	Execution time	Memory
923443		dreamoon	Self Study (JOI22_ho_t2)	C++14	100 / 100	207 ms	10836 KiB

Main

#include<bits/stdc++.h>
#define int long long
#define pii pair<int, int>
using namespace std;
 
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, m;
	cin >> n >> m;
	vector<int>a(n), b(n);
	for (auto &i : a) cin >> i;
	for (auto &i : b) cin >> i;
	
	int l = -1, r = (long long)1e18 + 5, mid;
	while (l + 1 < r) {
		mid = (l + r) / 2;
		int need = 0;
		for (int i = 0 ; i < n ; i++) {
			if (a[i] > b[i]) {
				if (mid > (__int128)a[i] * m) need += m + (mid - a[i] * m) / b[i] + ((mid - a[i] * m) % b[i] != 0ll ? 1ll : 0ll);
				else need += (mid / a[i]) + (mid % a[i] != 0ll ? 1ll : 0ll);
			} else {
				need += (mid / b[i]) + (mid % b[i] != 0ll ? 1ll : 0ll);
			}
            if(need > n * m) break;
		}
		if (need <= n * m) {
			l = mid;
			//cout << l << " " << need << "\n";
		} else {
			r = mid;
		}
	}
	cout << l << "\n";
}

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