Submission #1018827

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018827		vjudge1	Self Study (JOI22_ho_t2)	C++17	100 / 100	228 ms	5120 KiB

Main

#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
	int n, m;
	cin >> n >> m;
	vector <int> a(n), b(n);
	int mx = 0;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < n; i++) {
		cin >> b[i];
	}
	auto check = [&](int p) {
		int t = 0;
		for (int i = 0; i < n; i++) {
			if (b[i] > a[i]) {
				int B = (p + b[i] -1) / b[i];
				t += B;
			} else {
				if (a[i] * 1ll * m >= p) {
					int A = (p + a[i] - 1) / a[i];
					t += A;
				} else {
					int A = m;
					int B = (p - a[i] * 1ll * A + b[i] -1) / b[i];
					t += A + B;
				}
			}
			if(t > n * 1ll * m) return false;
		}
		if(t <= n * 1ll * m) return true;
		else return false;
	};
	int l = 0, r = 1e18 + 5;
	while (r - l > 1) {
		int mid = (l + r) >> 1;
		if (check(mid)) {
			l = mid;
		} else {
			r = mid;
		}
	}
	if(check(r)) cout << r <<"\n";
	else cout << l << "\n";
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:8:6: warning: unused variable 'mx' [-Wunused-variable]
    8 |  int mx = 0;
      |      ^~

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