/in/foo.cc: In function 'int cfgs(int)':
/in/foo.cc:26:1: warning: no return statement in function returning non-void [-Wreturn-type]
 } 
 ^
/in/foo.cc: In function 'int cfsl(int)':
/in/foo.cc:9:35: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if(int (j)==j&&j>=i) cnt++;
                                   ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:35: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if(int (j)==j&&j>=i) cnt++;
                                   ^
/in/foo.cc:5:6: note: 'cnt' was declared here
  int cnt;
      ^~~