/in/foo.cc: In function 'int main()':
/in/foo.cc:12:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (i=1;i<=n;i++) scanf("%d",&a[i]); sort(a+1,a+n+1,cmp);
  ^~~
/in/foo.cc:12:40: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for (i=1;i<=n;i++) scanf("%d",&a[i]); sort(a+1,a+n+1,cmp);
                                        ^~~~