foo.cc: In function 'int main()':
foo.cc:7:18: warning: right operand of comma operator has no effect [-Wunused-value]
    7 |         for(i=0,i<n,i++)
      |                 ~^~
foo.cc:7:24: error: expected ';' before ')' token
    7 |         for(i=0,i<n,i++)
      |                        ^
      |                        ;
foo.cc:15:23: error: 'penalty' was not declared in this scope
   15 |         printf("%d\n",penalty);
      |                       ^~~~~~~
foo.cc:16:9: error: expected primary-expression before 'return'
   16 |         return 0;
      |         ^~~~~~
foo.cc:15:32: error: expected ')' before 'return'
   15 |         printf("%d\n",penalty);
      |                                ^
      |                                )
   16 |         return 0;
      |         ~~~~~~                  
foo.cc:7:12: note: to match this '('
    7 |         for(i=0,i<n,i++)
      |            ^

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