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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. int N=0, sum=0;
  8. cin >> N;
  9.  
  10. char a;
  11. cin >> a;
  12.  
  13. for( int i=0 ; i<N ; i++ )
  14. {
  15. sum += ( a[i] - '0' );
  16. }
  17.  
  18. return 0;
  19. }
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
Standard input is empty
compilation info
prog.cpp:15:13: error: subscripted value is not an array, pointer, or vector
                sum += ( a[i] - '0' );
                         ~^~
1 error generated.
stdout
Standard output is empty