Submission #1249260

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249260		chikien2009	Remittance (JOI19_remittance)	C++20	0 / 100	0 ms	328 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 < 2 * n; ++j)
    {
        i = j % n;
        if (a[i] > b[i])
        {
            rem += a[i] - b[i];
            a[i] = b[i];
        }
        else
        {
            if (b[i] - a[i] > rem)
            {
                a[i] += rem;
                rem = 0;
            }
            else
            {
                rem -= b[i] - a[i];
                a[i] = b[i];
            }
        }
        if (rem & 1)
        {
            a[i]++;
        }
        rem /= 2;
    }
    for (int i = 0; i < n;  ++i)
    {
        if (a[i] != b[i])
        {
            cout << "No";
            return 0;
        }
    }
    cout << "Yes";
    return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45