| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
怎么才能减少时间啊?500ms我的算法很简单,就是计算n内有多少数是5的倍数,并且每个数能除几个5。
比如10,10/5=2;所以只有一个5,25/5=5,5/5=1,所以25有两个5 ,也就是说所有5的倍数,能分解为几个5
我的代码如下,怎么需要运行那么久呢????
#include <iostream>
using namespace std;
int main()
{
int line,num;
cin>>line;
while(line>0)
{
line--;
cin>>num;
if(num<5)
cout<<"0"<<endl;
else
{
int b=0;
while(num>5)
{
b+=num/5;
num=num/5;
}
cout<<b<<endl;
}
}
return 0;
}
Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator