foo.cc: In function 'int main()':
foo.cc:11:34: error: expected ';' before 'return'
   11 |         else cout << "No" << endl
      |                                  ^
      |                                  ;
   12 |         return 0;
      |         ~~~~~~                    
foo.cc:7:15: warning: unused variable 'b' [-Wunused-variable]
    7 |         int a,b,c;
      |               ^

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