题目链接:http://codeforces.com/problemset/problem/1166/B


题意:问你是否存在一个长度为 k 的字符串,使得你将他们平铺成一个矩形之后,每行每列都包含 5 个元音。

思路:先判断能否弄出至少5*5的行列,然后按顺序填字符串就好了。

AC代码:

 #include<iostream>
#include<cstdio>
#include<string>
using namespace std;
int main()
{
int k,m,n;
string a = "aeiou";
cin >> k;
for( n = ;n * n <= k && k % n != ;n++);
m = k / n;
if(k % n || m < ) cout << "-1" << endl;
else
{
for(int i = ;i < k;i++)
cout << a[(i % m + i /m)%];
}
return ;
}

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