/in/foo.cc: In function 'int main()':
/in/foo.cc:12:18: warning: right operand of comma operator has no effect [-Wunused-value]
   12 |         cout<<i,j;
      |                  ^
/in/foo.cc:7:15: warning: 'i' is used uninitialized [-Wuninitialized]
    7 |         if(a[i]>=0){
      |            ~~~^
/in/foo.cc:5:17: note: 'i' was declared here
    5 |         int n,m,i,j;
      |                 ^