foo.cc: In function 'int main()':
foo.cc:59:17: warning: statement has no effect [-Wunused-value]
   59 |             for(i;i<N;i++){
      |                 ^
foo.cc:50:17: warning: unused variable 'sub' [-Wunused-variable]
   50 |             int sub=10,temp[10];
      |                 ^~~

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