Submission #1322642

#	Time	Username	Problem	Language	Result	Execution time	Memory
1322642		maxFedorchuk	Remittance (JOI19_remittance)	C++20	100 / 100	146 ms	16068 KiB

remittance

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

const long long MX=1e6+10;
long long a[MX],b[MX];

int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    long long n;
    cin>>n;

    for(long long i=0;i<n;i++)
    {
        cin>>a[i]>>b[i];
    }

    while(true)
    {
        bool cng=0;

        for(long long i=0;i<n;i++)
        {
            if(a[i]>b[i])
            {
                long long am=(a[i]-b[i]+(b[i]!=0))/2;

                a[(i+1)%n]+=am;
                a[i]-=2*am;

                cng=max(cng,(am>0));
            }
        }

        if(!cng)
        {
            break;
        }
    }

    for(long long i=0;i<n;i++)
    {
        if(a[i]!=b[i])
        {
            cout<<"No\n";
            return 0;
        }
    }

    cout<<"Yes\n";
    return 0;
}

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