제출 #913893

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
913893		Ianis	Football (info1cup20_football)	C++17	0 / 100	22 ms	1620 KiB

football

#ifdef LOCAL
#include <iostream>
#include <fstream>
#include <iomanip>
#include <random>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>
#else
#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
#define cerr if (false) cerr 
#define endl '\n'
#endif

#define fi first
#define se second

#define sz(a) ((int)(a).size())
#define all(a) (a).begin(), (a).end()

#define lsb(x) (x & (-x))

#define bit(mask, i) (((mask) >> (i)) & 1)
#define popcount(x) __builtin_popcount(x)

#define YES cout << "YES" << endl
#define NO cout << "NO" << endl

using namespace std;

template <typename T>
bool ckmax(T &a, T b) { return a < b ? a = b, true : false; }
template <typename T>
bool ckmin(T &a, T b) { return a > b ? a = b, true : false; }

using ll = long long;
using pii = pair<int, int>;

const int NMAX = 1e5+5;

int n, k;
int a[NMAX];

void read() {
   cin >> n >> k;
   for (int i = 1; i <= n; i++)
      cin >> a[i];
}

bool solve() {
   int ans = 0;
   for (int i = 1; i <= n; i++) {
      ans ^= a[i];
   }
   return ans;
}

signed main() {
#ifdef LOCAL
   freopen("input.txt", "r", stdin);
#endif
   ios_base::sync_with_stdio(false);
   cin.tie(0);
   cout.tie(0);
   
   int t = 1;
   cin >> t;

   while (t--) {
      read();
      cout << solve();
   }

   return 0;
}

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