基础练习 FJ的字符串

1187: 基础练习 FJ的字符串

时间限制: 1 Sec  内存限制: 512 MB
提交: 1  解决: 1
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题目描述

FJ在沙盘上写了这样一些字符串：
A1 = “A”
A2 = “ABA”
A3 = “ABACABA”
A4 = “ABACABADABACABA”
… …
你能找出其中的规律并写所有的数列AN吗？

输入

仅有一个数：N ≤ 26。

输出

请输出相应的字符串AN，以一个换行符结束。输出中不得含有多余的空格或换行、回车符。

样例输入

3

样例输出

ABACABA

提示

来源

#include<iostream>
#include<string.h>
#include<math.h>
using namespace std;
int main()
{
	int i,n;
	string s[27],s1[27]={"A","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
	s[1]="A";
	for(i=2;i<=26;i++)
	{
		s[i]=s[i-1]+s1[i]+s[i-1];
	//	cout<<s[i]<<endl;
	}
	cin>>n;
	cout<<s[n]<<endl;
	
	
}
			

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