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病毒变种
病毒DNA可以表示成由一些字母组成的字符串序列，且病毒的DNA序列是环状的。例如，假设病毒的DNA序列为baa，则该病毒的DNA序列有三种变种：baa,aab,aba。试编写一程序，对给定的病毒DNA序列，输出该病毒所有可能的DNA序列(假设变种不会重复)。
输入格式:
输入第一行中给出1个整数i(1≤i≤11)，表示待检测的病毒DNA。 输入i行串序列，每行一个字符串，代表病毒的DNA序列，病毒的DNA序列长度不超过500。
输出格式:
依次逐行输出每个病毒DNA所有变种，各变种之间用空格分隔。
输入样例1:
1 baa
结尾无空行
输出样例1:
baa aab aba
结尾无空行
输入样例2:
2 abc baac
结尾无空行
输出样例2:
abc bca cab baac aacb acba cbaa
结尾无空行
代码段示例如下：
#include <stdio.h> #include <string.h> void DNApaixu(char *str); int main() {
int N,i; char a[500]; scanf("%d",&N); for(i=0;i<N;i++) { scanf("%s",a);
DNApaixu(a); printf("\n"); } return 0; } void DNApaixu(char *str) { int n,i,j;
n=strlen(str); printf("%s ",str); for(i=1;i<n;i++) { str[n]=str[0];
for(j=1;j<=n;j++) { str[j-1]=str[j]; } str[j-1]='\0'; printf("%s ",str); } }
