#include using namespace std; template inline void chmin(T1 &a,T2 b){if(a>b) a=b;} template inline void chmax(T1 &a,T2 b){if(a>n>>d; vector ds(n); for(Int i=1;i>a; ds[i]=ds[i-1]+a; } cout<<0; for(Int i=1;i