/in/foo.cc: In function 'int main()':
/in/foo.cc:26:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
 #define pd(i) printf("%d", i)
                             ^
/in/foo.cc:72:5: note: in expansion of macro 'pd'
     pd(ans);
     ^~