/in/foo.cc: In function 'int main()':
/in/foo.cc:17:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(r==0)
     ^~
/in/foo.cc:19:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
      cnt++;
      ^~~
/in/foo.cc:11:15: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   for(int j=j+1;j<=b;j++)
               ^