【链接】 我是链接,点我呀:)
【题意】

【题解】

每个单词的前缀都不同。
不能更明示了...
裸的字典树。
模拟一下。输出一下就ojbk了。

【代码】

#include <bits/stdc++.h>
#define LL long long
#define rep1(i,a,b) for (int i = a;i <= b;i++)
#define rep2(i,a,b) for (int i = a;i >= b;i--)
#define all(x) x.begin(),x.end()
#define pb push_back
#define lson l,mid,rt<<1
#define ri(x) scanf("%d",&x)
#define rl(x) scanf("%lld",&x)
#define rs(x) scanf("%s",x)
#define rson mid+1,r,rt<<1|1
using namespace std;const double pi = acos(-1);
const int dx[4] = {0,0,1,-1};
const int dy[4] = {1,-1,0,0};const int NN = 10000;
const int SI = 10;
const int N = 2e5;int ch[NN+10][2],flag[NN+10];
int tot,m,n;
char si[SI+10];
char s[N+10];
int result[N*4+10],cur;void ins(int ci){int len = strlen(si);int now = 1;for (int i = 0;i < len;i++){if (ch[now][si[i]-'0']==0){ch[now][si[i]-'0'] = ++tot;}now = ch[now][si[i]-'0'];}flag[now] = ci;
}void cl(char key){cur++;int num = 0;if (key>='a' && key<='z'){key = key-'a'+'A';}if (key>='A' && key<='Z'){num+=key-'A'+10;}else num = key-'0';for (int i = cur+3;i>=cur;i--){result[i] = num&1;num/=2;}cur = cur+3;
}int main(){#ifdef LOCAL_DEFINEfreopen("rush_in.txt", "r", stdin);#endifios::sync_with_stdio(0),cin.tie(0);int T;cin >> T;while (T--){memset(ch,0,sizeof ch);memset(flag,255,sizeof flag);tot = 1;cin >> m >> n;for (int i = 1;i <= n;i++){int ci;cin >> ci >> si;ins(ci);}cin >> s;int len = strlen(s);cur = 0;for (int i = 0;i < len;i++) cl(s[i]);int now = 1;for (int i = 1;i <= cur;){if (i+8>cur) break;int cnt = 0;for (int j = i;j <= i+7;j++)if (result[j]==1) cnt++;int odd = result[i+8];odd=1-odd;if ((cnt&1)==(odd&1)){for (int j = 1;j <= 8;j++){result[now+j-1]=result[i+j-1];}now = now + 8;}i = i+9;}int index = 1;for (int i = 1;i <= m;i++){int now = 1;for (int j = index;;j++){now = ch[now][result[j]];if (flag[now]!=-1) {index = j+1;char key = flag[now];cout<<key;break;}}}cout<<endl;}return 0;
}