Submission #1000799

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000799		Hanksburger	Self Study (JOI22_ho_t2)	C++17	100 / 100	146 ms	11532 KiB

Main

#include <bits/stdc++.h>
using namespace std;
long long a[300005], b[300005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long n, m, l=0, r=2e18;
    cin >> n >> m;
    for (long long i=1; i<=n; i++)
        cin >> a[i];
    for (long long i=1; i<=n; i++)
        cin >> b[i];
    while (l<r)
    {
        long long mid=(l+r+1)/2, cnt=0;
        for (long long i=1; i<=n; i++)
        {
            if (a[i]<b[i])
                cnt+=(mid-1)/b[i]+1;
            else if (mid<=a[i]*m)
                cnt+=(mid-1)/a[i]+1;
            else
                cnt+=m+(mid-a[i]*m-1)/b[i]+1;
            if (cnt>2e18)
                break;
        }
        if (cnt<=n*m)
            l=mid;
        else
            r=mid-1;
    }
    cout << l;
}

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