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  1. #include <iostream>
  2. using namespace std;
  3. int main() {
  4. int a;
  5. cin>>a;
  6. if(a/100000+(a/10000)%10+(a/1000)%10==a%10+(a%100)/10+(a%1000)/100)
  7. cout<<"YES";
  8. else
  9. cout<<"NO";
  10. return 0;
  11. }
  12.  
Success #stdin #stdout 0.01s 5288KB
stdin
123321
stdout
YES