/in/foo.cc: In function 'int main()':
/in/foo.cc:12:12: warning: unused variable 'sum' [-Wunused-variable]
  long long sum=0;
            ^~~
/in/foo.cc:13:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,l,r,suit,mid,s1,s2;
        ^
/in/foo.cc:72:29: warning: 's2' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<num[s1]<<endl<<num[s2]<<endl;
                             ^
/in/foo.cc:72:14: warning: 's1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<num[s1]<<endl<<num[s2]<<endl;
              ^