/in/foo.c: In function 'MergeSubs':
/in/foo.c:28:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if(a[i]>a[i+1])
     ^
/in/foo.c: In function 'main':
/in/foo.c:47:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=0;i<n2;i++)
     ^~~
/in/foo.c:49:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  MergeSubs(a1,n1);
  ^~~~~~~~~