Submission #969489

#	Time	Username	Problem	Language	Result	Execution time	Memory
969489		modwwe	Self Study (JOI22_ho_t2)	C++17	100 / 100	361 ms	11092 KiB

Main

#include <iostream>
#include <algorithm>
#define f first
#define s second
using namespace std;
 
long long n, m, a[300010], b[300010], ans;
__int128 l = 0, r = 1e20, mid, cnt, req;
 
bool check() {
	cnt = req = 0;
	for (int i = 1; i <= n; i++) {
		if (b[i] > a[i]) {
			cnt += m;
			req += (mid+b[i]-1)/b[i];
		} else {
			if (a[i]*m >= mid) cnt += (a[i]*m-mid)/a[i];
			else req += (mid-a[i]*m+b[i]-1)/b[i];
		}
	}
	if (cnt < req) return 0;
	else return 1;
}
 
int main() {
	cin >> n >> m;
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = 1; i <= n; i++) cin >> b[i];
	while (l <= r) {
		mid = (l+r)/2;
		if (!check()) r = mid-1;
		else l = mid+1;
	}
	ans = r;
	cout << ans << endl;
}

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