Submission #1018840

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018840		vjudge1	Self Study (JOI22_ho_t2)	C++17	100 / 100	104 ms	5164 KiB

Main

#include "bits/stdc++.h"
#define int long long
using namespace std;

template <typename _T>
bool chmin(_T &a, const _T &b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template <typename _T>
bool chmax(_T &a, const _T &b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

signed main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m;
	cin >> n >> m;
	vector<int> a(n);
	for(auto &x : a){
	    cin >> x;
	} 
	vector<int> b(n);
	for(auto &x : b){
	    cin >> x;
	} 
	for(int i = 0; i < n; i++){
	    a[i] = max(a[i], b[i]);
	} 
	auto check = [&](int val) {
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        if (a[i] * m >= val) {
            cnt += ((val - 1) / a[i] + 1);
        } else {
            if (val > m * a[i]) {
                cnt += (m + (val - m * a[i] - 1) / b[i] + 1);
            } else {
                cnt += m;
            }
        }
        if (cnt > m * n) return false;
    }
    return cnt <= m * n;
};

	
	int l = 0, r = 2e18;
while (l + 1 < r) {
    int mid = l + (r - l) / 2;
    if (check(mid)) {
        l = mid;
    } 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