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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	const int MAX_SIZE = 256;
  7. 	char *c = new char [MAX_SIZE];     
  8. 	cin.getline (c,MAX_SIZE);
  9.     int a=0;        
  10.     for(int i=0;i<strlen(c);i++){
  11.         a+=c[i]-'0';
  12.     }
  13.     if(a%3==0)cout<<"YES";
  14.     else cout<<"NO";
  15.     return 0;
  16. }
Success #stdin #stdout 0s 3416KB
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stdout
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YES
https://ideone.com/AOBlvv
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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