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数据都过了,但是为什么就是WA啊。求大神教教小弟。十分感谢啊。以下附代码。

Posted by mm353395330 at 2012-11-27 21:26:00 on Problem 3087
#include <iostream>
#include <cstring>
#include <queue>
using namespace std;
string s1,s2,c;
int n,m;
struct node
{
    string cc;
    int t;
};
int bfs()
{
    queue<node> p;
    while(!p.empty()) p.pop();
    node q;
    for(int i=0;i<m;i++)
    {
        q.cc+=s2[i];
        q.cc+=s1[i];
    }
    q.t=1;
    p.push(q);
    while(!p.empty())
    {
        if(p.front().cc==c)
        return p.front().t;
        for(int i=0;i<m;i++)
        s2[i]=p.front().cc[i];
        for(int i=m,j=0;i<2*m;i++,j++)
        s1[j]=p.front().cc[i];
        node pp;
        for(int i=0;i<m;i++)
        {
        pp.cc+=s2[i];
        pp.cc+=s1[i];
        }
        pp.t=p.front().t+1;
        p.push(pp);
        p.pop();
        if(p.front().cc==q.cc)
        return -1;
    }
    return -1;
}
int main()
{
    int num,num1=1;
    cin>>n;
    while(n--)
    {

        cin>>m;
        s1="\0";
        s2="\0";
        c="\0";
        cin>>s1>>s2>>c;
        num=bfs();
        cout<<num1<<" "<<num<<endl;
        num1++;
    }
    return 0;
}


求大神帮忙啊。小弟十分感谢啊。

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