Submission #431709

#	Time	Username	Problem	Language	Result	Execution time	Memory
431709		ScarletS	Remittance (JOI19_remittance)	C++17	0 / 100	1 ms	204 KiB

remittance

#include <bits/stdc++.h>
#define ll long long
#define sz(x) (int)(x).size()
using namespace std;

const int N = 1e6+5;
int n, x, a[N][2], b[N][2];

void reset()
{
    for (int i=0;i<n;++i)
        for (int j=0;j<2;++j)
            b[i][j]=a[i][j];
}

bool solve(int k)
{
    for (int i=0;i<n*40;++i)
    {
        x=b[(k+i)%n][0]-b[(k+i)%n][1];
        if (x>0&&b[(k+i)%n][0]>1)
        {
            b[(k+i)%n][0]-=((x+1)/2)*2;
            b[(k+i+1)%n][0]+=(x+1)/2;
        }
    }
    for (int i=0;i<n;++i)
        if (b[i][0]!=b[i][1])
            return 0;
    return 1;
}
  
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>n;
    for (int i=0;i<n;++i)
        cin>>a[i][0]>>a[i][1];
    for (int i=0;i<n;++i)
    {
        reset();
        if (solve(i))
        {
            cout<<"Yes";
            return 0;
        }
    }
    cout<<"No";
    return 0;
}

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