Submission #1343505

#	Time	Username	Problem	Language	Result	Execution time	Memory
1343505		hoangtien69	Self Study (JOI22_ho_t2)	C++20	0 / 100	47 ms	2748 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int MAXN = 3e5 + 5;

int n, m;
int a[MAXN];
int b[MAXN];

bool ck(int mid)
{
    int cnt = 0;
    for (int i = 1; i <= n; i++)
    {
        if (mid > a[i] * m)
        {
            cnt += m;
            int need = mid - a[i] * m;
            cnt += (need + b[i] - 1) / b[i];
        }
        else
        {
            cnt += (mid + a[i] - 1) / a[i];
        }
    }
    return cnt <= n * m;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> m;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) cin >> b[i];
    
    int l = 0, r = 1e18, ans = -1;
    while (l <= r)
    {
        int mid = (l + r) / 2;
        if (ck(mid))
        {
            ans = mid;
            l = mid + 1;
        }
        else
        {
            r = mid - 1;
        }
    }
    cout << ans << "\n";
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 9