foo.cc: In function ‘int main()’:
foo.cc:6:22: warning: ‘n’ is used uninitialized [-Wuninitialized]
    6 |         for(int i=0;i<n;i++)
      |                     ~^~
foo.cc:5:13: note: ‘n’ was declared here
    5 |         int n,h,m,g,z=0;
      |             ^
foo.cc:9:17: warning: ‘h’ may be used uninitialized [-Wmaybe-uninitialized]
    9 |                 if(m<=h)
      |                 ^~
foo.cc:5:15: note: ‘h’ was declared here
    5 |         int n,h,m,g,z=0;
      |               ^