//模拟洗牌，不知道为什么分类是bfs
#include<iostream>
using namespace std;
char s1[101];
char s2[101];
char s12[201];//每次洗牌后的串
char s[201]; //目标串
char first[201];//第一次洗牌后的串
int n,len,len2;
int step;
void shuf()
{
int i,j;
step=1;
while(step)
{
for(i=0,j=0;i<len;i++)
{
s12[j++]=s2[i];
s12[j++]=s1[i];
}
len2=j;
if(step==1) strcpy(first,s12);
if(strcmp(s,s12)==0) return ;
if(step!=1 && strcmp(s12,first)==0) { step=-1;return ;}
for(j=0;j<len;j++)
s1[j]=s12[j];
for(;j<len2;j++)
s2[j-len]=s12[j];
step++;
}
}
int main()
{
int i,j,k;
scanf("%d",&n);
for(k=1;k<=n;k++)
{
memset(s,0,sizeof(s));
memset(first,0,sizeof(first));
memset(s12,0,sizeof(s12));
scanf(" %d %s %s %s",&len,&s1,&s2,&s);
shuf();
if(step==-1) printf("%d -1\n",k);
else printf("%d %d\n",k,step);
}
return 0;
}posted on 2009-07-23 15:12
wyiu 阅读(199)
评论(0) 编辑 收藏 引用 所属分类:
POJ