/in/foo.cc: In function 'int main()':
/in/foo.cc:10:23: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]
   10 |                 a=sqrt(m-b);
      |                   ~~~~^~~~~
/in/foo.cc:5:25: note: 'b' was declared here
    5 |         int n,m,cnt=0,a,b;
      |                         ^