/in/foo.cc: In function 'int ss(int)':
/in/foo.cc:13:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,n,m;
        ^
/in/foo.cc:13:10: warning: unused variable 'n' [-Wunused-variable]
  int i,j,n,m;
          ^
/in/foo.cc:13:12: warning: unused variable 'm' [-Wunused-variable]
  int i,j,n,m;
            ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:23:16: warning: unused variable 'j' [-Wunused-variable]
  int n,b=0,c,i,j,m;
                ^