OJ-Problems-Source/HDOJ/3287_autoAC.cpp

#include<iostream>
#include<cstring>
#include<cstdio>
#include <string>
#include <deque>
#include<cmath>
#include<algorithm>
using namespace std;
struct node{
    int num;
    int cnt;
    string str;
}p[830000], tmp, t;
int p7[8] = {0, 1, 7, 49, 343, 2401, 16807, 117649};
int tnum[8];
int num = 1 * p7[1] + 2 * p7[2] + 3 * p7[3] + 4 * p7[4] + 5 * p7[5] + 6 * p7[6] ; 
int tu[8][8] ={
    0, 1, 2, 3, 4, 5, 6, 7,
    0, 0, 1, 0, 0, 0, 6, 0,
    0, 1, 0, 3, 0, 0, 0, 7,
    0, 0, 2, 0, 4, 0, 0, 0,
    0, 0, 0, 3, 0, 5, 0, 0,
    0, 0, 0, 0, 4, 0, 6, 7,
    0, 1, 0, 0, 0, 5, 0, 0,
    0, 0, 2, 0, 0, 5, 0, 0,
};
deque<node> q;
int maxx = 0;
void init(){
    p[num].num = num;
    p[num].cnt = 0;
    q.push_back(p[num]);
    while(!q.empty()){
        tmp = q.front(); q.pop_front();
        int k;
        for(int i = 1, n = tmp.num;i < 8; i ++){
            tnum[i] = n % 7;
            if(tnum[i] == 0) k = i;
            n /= 7;
        }
        for(int j = 1; j < 8; j ++)
            if(tu[k][j]){
                t.cnt = tmp.cnt + 1;
                t.num = tmp.num - p7[j] * tnum[j] + p7[k] * tnum[j];
                if(p[t.num].num == 0) {
                    t.str = tmp.str + (char)(tnum[j] + 'A' - 1);
                    q.push_back(t);
                    p[t.num] = t;
                } 
            }
    }
}
int main(){
    init();
    string s;
    int T, t;
    scanf("%d", &T);
    while(T --){
        scanf("%d", &t);
        cin>>s;
        int num = 0;
        for(int i = 0; i < s.length(); i ++){
            num += p7[i + 1] * (s[i] - 'A'+ 1);
        }
        s = p[num].str;
        string str(s.rbegin(), s.rend());
        if(p[num].cnt == 0 && num != 114381) cout<<t<<" "<<"NO SOLUTION"<<endl;
        else cout<<t<<" "<<p[num].cnt<<" "<<str<<endl;
    }
}