#include<bits/stdc++.h>
using namespace std;
int main()
{
int fish; //e拿之前剩下的鱼数量
int newfish;//迭代变量,记录鱼的数量
int finish, isOK; // 结束标志
int i;//for循环控制变量
finish = 0;
for (fish = 6; finish == 0; fish += 5)//E递增且满足(E-1)%5==0.
{
newfish = fish;
isOK = 1;
for (i = 1; i <= 4 && isOK == 1; i++) //四次循环,依次求得D,B,C,A
{
newfish = newfish * 5 / 4 + 1;
if ((newfish - 1) % 5 != 0)//如果不满足(fish-1)%5==0
isOK = 0;
}//end for(i)
if (isOK == 1)finish = 1;
}//end for(fish)
cout<<"至少是<"<newfish<<"条鱼";
return 0;
}