10 1
13
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double vul,d;int n;
while(cin>>vul>>d)
{
for( n=1;n*d*(n+1)<vul*2;n++);
cout<<ceil(vul/d)+n-1<<endl;
}
return 0;
}
原文地址：http://blog.csdn.net/lsgqjh/article/details/44891725
