有點水
AC程式碼

#include <cstdio>
#include <cmath>
#include <cstring>
int main()
{
	int T, i, j;
	char gene[101], seq[101][101], ans[101];
	int n;
	scanf("%d", &T);
	while (T--)
	{
		scanf("%s", gene);
		n = strlen(gene);
		int k = 0;
		for (i = 0; i < n; i++)
		{
			for (j = 0; j < n;
 
 j++)
				seq[i][j] = gene[(j + i) % n];
			seq[i][n] = '\0';
		}
		strcpy(ans, gene);
		for (i = 0; i < n; i++)
		{
			if (strcmp(seq[i], ans)<0)
				strcpy(ans, seq[i]);
		}
		printf("%s\n", ans);
	}
}