This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int INF = 1ll << 60;
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(n);
    for (auto& el : a)
        cin >> el;
    for (auto& el : b)
        cin >> el;
    for (int i = 0; i < n; ++i)
        a[i] = max(a[i], b[i]);
    int l = 0, r = INF;
    while (l + 1 < r) {
        int mid = (l + r) / 2;
        int total = 0;
        for (int i = 0; i < n; ++i) {
            if (a[i] * m >= mid) {
                total += (mid + a[i] - 1) / a[i];
                continue;
            }
            total += m + (mid - a[i] * m + b[i] - 1) / b[i];
        }
        if (total <= n * m)
            l = mid;
        else
            r = mid;
    }
    cout << l;
}
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... |