Xor Sum HDU - 4825（01字典序板题）

#include <iostream>
#include <cstdio>
#include <sstream>
#include <cstring>
#include <map>
#include <set>
#include <vector>
#include <stack>
#include <queue>
#include <algorithm>
#include <cmath>
#define rap(i, a, n) for(int i=a; i<=n; i++)
#define rep(i, a, n) for(int i=a; i<n; i++)
#define lap(i, a, n) for(int i=n; i>=a; i--)
#define lep(i, a, n) for(int i=n; i>a; i--)
#define MOD 2018
#define LL long long
#define ULL unsigned long long
#define Pair pair<int, int>
#define mem(a, b) memset(a, b, sizeof(a))
#define _  ios_base::sync_with_stdio(0),cin.tie(0)
//freopen("1.txt", "r", stdin);
using namespace std;
const int maxn =  + , INF = 0x7fffffff;
LL trie[ * maxn][], value[ * maxn];
int rt, tot;

void build(LL s)
{
    rt = ;
    for(int i=; i>=; i--)
    {
        int x = (s >> i) & ; //  取每一位
        if(trie[rt][x] == )
        {
            trie[rt][x] = ++tot;
        }
        rt = trie[rt][x];
    }
    value[rt] = s;      //最后的结点记录s
}

LL qp(LL s)
{
    rt = ;
    for(int i=; i>=; i--)
    {
        int x = (s >> i) & ;
        if(trie[rt][x^]) rt = trie[rt][x^];
        else rt = trie[rt][x];
    }
    return value[rt];
}

void init()
{
    tot = ;
    mem(trie, );
    mem(value, );
}

int main()
{
    int T, kase = ;
    scanf("%d", &T);
    while(T--)
    {
        init();
        int n, m;
        scanf("%d%d", &n, &m);
        rap(i, , n)
        {
            LL temp;
            scanf("%lld", &temp);
            build(temp);
        }
        printf("Case #%d:\n", ++kase);
        rap(i, , m)
        {
            LL temp;
            scanf("%lld", &temp);
            printf("%lld\n", qp(temp));
        }

    }
    return ;

}