Submission

Score: 100

User: rukdk

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-06 17:09:36

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	long long sum=0,x=0,y=0;
	cin>>s;
	vector<int> v,a;
	int ld=s[15]-'0';
	for(int i=s.length()-2;i>=0;i--){
		v.push_back(s[i]-'0');
	}
	for(int i=0;i<15;i++){
		if(i%2==0 && s[i]-'0'<5){
			
			a.push_back((s[i]-'0')*2);
		}
		else if(i%2==0 && s[i]-'0'>=5){
			x=((s[i]-'0')*2)%10;
			y=((s[i]-'0')*2)/10;
			a.push_back(x);
			a.push_back(y);
		}
		else{
			a.push_back(s[i]-'0');
		}
		
	}
	for(int i=0;i<a.size();i++){
		sum+=a[i];
	}

	long long final=(10-(sum%10))%10;
	if(ld==final){
		cout<<"yes";
		
	}
	else if(ld!=final){
		cout<<"no";
	}
}