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求大牛们点拨一下,翻阅过discuss所有主题,不知道为什么WA

Posted by MadDigerati at 2007-02-23 19:02:15 on Problem 2590
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
	int n,t,p;
	long a,b;
	float d;
	cin>>n;
	while(n>0)
	{
		cin>>a>>b;
		if(a==b) 
		{
			p=0;
		}
		else
		{
			d=sqrt(4.0*(b-a));
			t=(int)d;
			if(t<d) p=t;
			else p=t-1;			
		}
		cout<<p<<endl;
		n--;
	}
	return 0;
}

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