foo.cc: In function ‘int main()’:
foo.cc:11:17: warning: ‘m’ may be used uninitialized [-Wmaybe-uninitialized]
   11 |                 if(t==m)
      |                 ^~
foo.cc:5:15: note: ‘m’ was declared here
    5 |         int n,m,sum=0;
      |               ^