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请高手指教,代码明明正确,但输出是wrong answer

Posted by ET11701233 at 2008-05-30 12:26:27 on Problem 1003 
#include <iostream>
using namespace std;
int main()
{  
	float number,avg=0.0;int n;
	cin>>number;
	if(number!=0.0&&number>0.01&&number<5.20)
	{for(n=1;avg<number;n++)
		avg=avg+(float)1/(n+1);
		cout<<n-1<<" "<<"card(s)";
	}
	
	return 0;
}
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