제출 #921457

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
921457		Ianis	Football (info1cup20_football)	C++17	26 / 100	23 ms	856 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];
ll sum;
 
void read() {
   cin >> n >> k;
   sum = 0;
   for (int i = 1; i <= n; i++) {
      cin >> a[i];
      sum += a[i];
   }
}
 
bool solve() {
   if (k == 1 || sum % 2 == 1)
     return sum % 2;
   
   int ans = 0;
   ll cnt = 0;

   for (int i = 1; i <= n; i++) {
      ans ^= a[i] / 2 + (a[i] % 2);
   }

   return ans != 0;
}
 
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;
}

컴파일 시 표준 에러 (stderr) 메시지

football.cpp: In function 'bool solve()':
football.cpp:62:7: warning: unused variable 'cnt' [-Wunused-variable]
   62 |    ll cnt = 0;
      |       ^~~

• Subtask 1: 26 / 26
• Subtask 2: 0 / 8
• Subtask 3: 0 / 11
• Subtask 4: 0 / 8
• Subtask 5: 0 / 16
• Subtask 6: 0 / 16
• Subtask 7: 0 / 7
• Subtask 8: 0 / 8