Submission #1177287

#	Time	Username	Problem	Language	Result	Execution time	Memory
1177287		chikien2009	Self Study (JOI22_ho_t2)	C++20	100 / 100	143 ms	5136 KiB

Main

#include <bits/stdc++.h>

using namespace std;

void setup()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int n;
long long m, l, r, mid, res, a[300000], b[300000];

inline bool Check(long long inp)
{
    long long k = 0, g = 0;
    for (int i = 0; i < n; ++i)
    {
        if (a[i] <= b[i])
        {
            k += m - (inp + b[i] - 1) / b[i];
        }
        else
        {
            if (a[i] * m <= inp)
            {
                k -= (inp - a[i] * m + b[i] - 1) / b[i];
            }
            else
            {
                k += (a[i] * m - inp) / a[i];
            }
        }
        while (k < -1e18)
        {
            g--;
            k += 1e18;
        }
        while (k > 1e18)
        {
            g++;
            k -= 1e18;
        }
    }
    return (k >= 0 && g >= 0) || (g >= 1);
}

int main()
{
    setup();

    cin >> n >> m;
    for (int i = 0; i < n; ++i)
    {
        cin >> a[i];
    }
    for (int i = 0; i < n; ++i)
    {
        cin >> b[i];
    }
    l = 1;
    r = 2e18;
    while (l <= r)
    {
        mid = (l + r) >> 1;
        if (Check(mid))
        {
            res = mid;
            l = mid + 1;
        }
        else
        {
            r = mid - 1;
        }
    }
    cout << res;
    return 0;
}

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