結果
問題 | No.1072 A Nice XOR Pair |
ユーザー | Shuz* |
提出日時 | 2020-06-05 21:26:10 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 253 ms / 2,000 ms |
コード長 | 4,399 bytes |
コンパイル時間 | 1,581 ms |
コンパイル使用メモリ | 177,064 KB |
実行使用メモリ | 25,600 KB |
最終ジャッジ日時 | 2024-05-09 19:55:36 |
合計ジャッジ時間 | 2,994 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 3 ms
6,940 KB |
testcase_07 | AC | 171 ms
17,536 KB |
testcase_08 | AC | 27 ms
6,944 KB |
testcase_09 | AC | 25 ms
6,940 KB |
testcase_10 | AC | 47 ms
6,944 KB |
testcase_11 | AC | 150 ms
12,672 KB |
testcase_12 | AC | 253 ms
25,600 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; // Define using ll = long long; using ull = unsigned long long; using ld = long double; template <class T> using pvector = vector<pair<T, T>>; template <class T> using rpriority_queue = priority_queue<T, vector<T>, greater<T>>; constexpr const ll dx[4] = {1, 0, -1, 0}; constexpr const ll dy[4] = {0, 1, 0, -1}; constexpr const ll MOD = 1e9 + 7; constexpr const ll mod = 998244353; constexpr const ll INF = 1LL << 60; constexpr const ll inf = 1 << 30; constexpr const char rt = '\n'; constexpr const char sp = ' '; #define mp make_pair #define mt make_tuple #define pb push_back #define eb emplace_back #define elif else if #define all(a, v, ...) \ ([&](decltype((v)) w) { return (a)(begin(w), end(w), ##__VA_ARGS__); })(v) #define rall(a, v, ...) \ ([&](decltype((v)) w) { return (a)(rbegin(w), rend(w), ##__VA_ARGS__); })(v) #define fi first #define se second template <class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; } template <class T> bool chmin(T &a, const T &b) { if (a > b) { a = b; return 1; } return 0; } // Debug #define debug(...) \ { \ cerr << __LINE__ << ": " << #__VA_ARGS__ << " = "; \ for (auto &&X : {__VA_ARGS__}) cerr << "[" << X << "] "; \ cerr << rt; \ } #define dump(a, h, w) \ { \ cerr << __LINE__ << ": " << #a << " = [" << rt; \ rep(_i, h) { \ rep(_j, w) cerr << a[_i][_j] << sp; \ cerr << rt; \ } \ cerr << "]" << rt; \ } #define vdump(a, n) \ { \ cerr << __LINE__ << ": " << #a << " = ["; \ rep(_i, n) if (_i) cerr << sp << a[_i]; \ else cerr << a[_i]; \ cerr << "]" << rt; \ } // Loop #define inc(i, a, n) for (ll i = (a), _##i = (n); i <= _##i; ++i) #define dec(i, a, n) for (ll i = (a), _##i = (n); i >= _##i; --i) #define rep(i, n) for (ll i = 0, _##i = (n); i < _##i; ++i) #define each(i, a) for (auto &&i : a) // Stream #define fout(n) cout << fixed << setprecision(n) struct io { io() { cin.tie(nullptr), ios::sync_with_stdio(false); } } io; // Speed #pragma GCC optimize("Ofast") #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") // Math inline constexpr ll gcd(const ll a, const ll b) { return b ? gcd(b, a % b) : a; } inline constexpr ll lcm(const ll a, const ll b) { return a / gcd(a, b) * b; } inline constexpr ll modulo(const ll n, const ll m = MOD) { ll k = n % m; return k + m * (k < 0); } inline constexpr ll chmod(ll &n, const ll m = MOD) { n %= m; return n += m * (n < 0); } inline constexpr ll mpow(ll a, ll n, const ll m = MOD) { ll r = 1; rep(i, 64) { if (n & (1LL << i)) r *= a; chmod(r, m); a *= a; chmod(a, m); } return r; } inline ll inv(const ll n, const ll m = MOD) { ll a = n, b = m, x = 1, y = 0; while (b) { ll t = a / b; a -= t * b; swap(a, b); x -= t * y; swap(x, y); } return modulo(x, m); } signed main() { ll N, X; cin >> N >> X; ll A[N], res = 0; map<ll, ll> M; rep(i, N) { cin >> A[i]; res += M[X ^ A[i]]; M[A[i]]++; } cout << res << rt; } // -g -D_GLIBCXX_DEBUG -fsanitize=undefined