Submission #1131875

#	Time	Username	Problem	Language	Result	Execution time	Memory
1131875		lopkus	Self Study (JOI22_ho_t2)	C++20	100 / 100	152 ms	4936 KiB

Main

#include <bits/stdc++.h>

#define int long long

using namespace std;

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, m;
    cin >> n >> m;
    vector<int> a(n + 1, 0);
    vector<int> b(n + 1, 0);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    for(int i = 1; i <= n; i++) {
        cin >> b[i];
        a[i] = max(a[i], b[i]);
    }
    int l = 0, r = 1e18, ans = - 1;
    while(l <= r) {
        int mid = (l + r) / 2;
        int save = 0;
        int ok = 1;
        for(int i = 1; i <= n; i++) {
            if(m * a[i] >= mid) {
                save += m - (mid + a[i] - 1) / a[i];
            }
        }
        for(int i = 1; i <= n; i++) {
            if(m * a[i] < mid) {
                save -= (mid - m * a[i] + b[i] - 1) / b[i];
            }
            if(save < 0) {
                ok = 0;
            }
        }
        if(ok) {
            l = mid + 1;
            ans = mid;
        }
        else {
            r = mid - 1;
        }
    }
    cout << ans;
}

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