foo.cc: In function 'int main()':
foo.cc:8:19: warning: unused variable 'j' [-Wunused-variable]
    8 |     int n,na,nb,i,j,sumA=0,sumB=0,pin=0;
      |                   ^
foo.cc:8:35: warning: unused variable 'pin' [-Wunused-variable]
    8 |     int n,na,nb,i,j,sumA=0,sumB=0,pin=0;
      |                                   ^~~

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