Submission #757386

#	Time	Username	Problem	Language	Result	Execution time	Memory
757386		alexdd	송금 (JOI19_remittance)	C++17	100 / 100	857 ms	28552 KiB

remittance

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n;
int a[1000005];
int b[1000005];
bool running()
{
    for(int i=0;i<n;i++)
        if(min((a[i]-b[i]+1)/2, a[i]/2)>0)
            return 1;
    return 0;
}
signed main()
{
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>a[i]>>b[i];
    }
    while(running())
    {
        for(int i=0;i<n;i++)
        {
            if(min((a[i]-b[i]+1)/2, a[i]/2)>0)
            {
                int x = min((a[i]-b[i]+1)/2, a[i]/2);
                a[i] -= 2*x;
                a[(i+1)%n] += x;
            }
        }
    }
    bool good=1;
    for(int i=0;i<n;i++)
        if(a[i]!=b[i])
            good=0;
    if(good)
        cout<<"Yes";
    else
        cout<<"No";
    return 0;
}

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