foo.cc: In function ‘int main()’:
foo.cc:17:17: warning: ‘ma’ may be used uninitialized [-Wmaybe-uninitialized]
   17 |                 if(a[i]>ma){
      |                 ^~
foo.cc:7:26: note: ‘ma’ was declared here
    7 |         int a[n+1],x,y,z,ma,sum=0;
      |                          ^~