Submission #1249269

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249269		chikien2009	Remittance (JOI19_remittance)	C++20	100 / 100	367 ms	8264 KiB

remittance

#include <bits/stdc++.h>

using namespace std;

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

int n, a[1000000], b[1000000], rem;

int main()
{
    setup();

    cin >> n;
    for (int i = 0; i < n; ++i)
    {
        cin >> a[i] >> b[i];
    }
    for (int i, j = 0; j < 31 * n; ++j)
    {
        i = j % n;
        rem = max(0, a[i] - b[i]);
        rem += (rem & 1);
        if (rem <= a[i])
        {
            a[i] -= rem;
            a[(i + 1) % n] += rem / 2;
        }
    }
    for (int i = 0; i < n; ++i)
    {
        if (a[i] != b[i])
        {
            cout << "No";
            return 0;
        }
    }
    cout << "Yes";
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45