Submission #936309

#	Time	Username	Problem	Language	Result	Execution time	Memory
936309		qwe1rt1yuiop1	Self Study (JOI22_ho_t2)	C++14	100 / 100	224 ms	11348 KiB

Main

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

void solve()
{
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(n);
    for (int &i : a)
        cin >> i;
    for (int &i : b)
        cin >> i;

    int l = 0, r = 3e18;
    while (l + 1 < r)
    {
        int mid = (l + r) >> 1, lft = n * m;

        for (int i = 0; i < n && lft >= 0; ++i)
            if (a[i] <= b[i])
            {
                int cnt = mid / b[i] + (mid % b[i] > 0);
                assert(cnt * b[i] >= mid && (cnt - 1) * b[i] < mid);
                lft -= cnt;
            }
            else
            {
                int cnt = mid / a[i] + (mid % a[i] > 0);
                cnt = min(cnt, m);
                lft -= cnt;
                if (lft < 0)
                    break;
                if (cnt * a[i] < mid)
                {
                    cnt = (mid - cnt * a[i]) / b[i] + ((mid - cnt * a[i]) % b[i] > 0);
                    lft -= cnt;
                }
            }

        if (lft >= 0)
            l = mid;
        else
            r = mid;
    }
    cout << l << '\n';
}

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

    solve();

    return 0;
}

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