Submission

Score: 0

User: natcha

Problemset: ตรวจบัตรเครดิต

Language: cpp

Time: 0.002 second

Submitted On: 2026-10-07 19:08:00

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	cin>>s;
	string s2;
	int i;
	for(i=0;i<15;i++){
		s2+=s[i];
	}
	char k;
	for(i=0;i<7;i++){
		k = s2[i];
		s2[i] = s2[14-i];
		s2[14-i] = k;
	}
	int box[15];
	int n=0;
	for(i=0;i<15;i++){
		if(i%2==0){
			box[i] = (s2[i]-48)*2;
			if(box[i]/10>0){
				n+=box[i]%10;
				n+=box[i]/10;
			}
			else{
				n+=box[i];
			}
		}
		else{
			box[i] = s2[i]-48;
			if(box[i]/10>0){
				n+=box[i]%10;
				n+=box[i]/10;
			}
			else{
				n+=box[i];
			}
		}
	}
	int r;
	r = 10-(n%10);
	if(s[15]-48==r){
		cout<<"yes";
	}
	else{
		cout<<"no";
	}
}