foo.cc: In function 'int main()':
foo.cc:7:22: warning: left operand of comma operator has no effect [-Wunused-value]
    7 |         for(int i=1;i<=n/2,i<=9;i++){
      |                     ~^~~~~
foo.cc:8:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
    8 |                 ans++;
      |                 ^~~
      |                 abs
foo.cc:19:15: error: 'ans' was not declared in this scope; did you mean 'abs'?
   19 |         cout<<ans;
      |               ^~~
      |               abs

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