Submission

Score: 100

User: nattawin

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-06 09:54:38

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

int main()
{
	int sum;
	string num;
	cin>>num;
	vector<int> cra(16);
	for(int i = 0 ; i < 16 ; i++)
	{
		cra[i]=num[i]-'0';
	}
	for(int i = 0 ; i < 15; )
	{
		cra[i]=cra[i]*2;
		i+=2;
	}
//		for(int i = 0 ; i < 15; i++)
//	{
//		cout<<cra[i]<<" ";
//	}
//	cout<<endl;
	for(int i = 0 ; i < 15 ; i++)
	{
		if(cra[i]>9)
		{
			sum+=cra[i]%10;
			sum+=cra[i]/10;
		}
		else if(cra[i]<=9)
		{
			sum+=cra[i];
		}
	}
//	cout<<sum<<endl;
	if((10-(sum%10))%10==cra[15])
	{
		cout<<"yes";
	}
	else
	{
		cout<<"no";
	}
}