为什么洛谷上编译不过QaQ

#include <bits/stdc++.h>
using namespace std;
int main(){
	long long n,k,c=0,d=0;
	double ans1,ans2,a=0,b=0;
	cin>>n>>k;
	for(int i=1;i<=n;i++){
	if(i%k==0){
		a+=i;
		c+=1;
	}
	if(i%k!=0){
		b+=i;
		d+=1;
	}}
	cout<<a<<" "<<b<<" "<<c<<" "<<d<<endl;
	ans1=a/c;
	ans2=b/d;
	printf("%.1lf",ans1);
	cout<<" ";
	printf("%.1lf",ans2);
	return 0;
}