/in/foo.cc: In function 'int main()':
/in/foo.cc:31:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for (int i=1;i<=k;i++) scanf("%d",&a[i]); sort(a+1,a+1+k);
   ^~~
/in/foo.cc:31:45: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for (int i=1;i<=k;i++) scanf("%d",&a[i]); sort(a+1,a+1+k);
                                             ^~~~