/in/foo.cc: In function 'int main()':
/in/foo.cc:51:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(i=1;i<=n;i++)
   ^~~
/in/foo.cc:53:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    sort(dt+1,dt+n+1,comp);
    ^~~~
/in/foo.cc:49:15: warning: unused variable 'k' [-Wunused-variable]
   int h,r,i,j,k;
               ^