結果
問題 | No.1072 A Nice XOR Pair |
ユーザー |
|
提出日時 | 2020-06-05 22:02:46 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 205 ms / 2,000 ms |
コード長 | 2,807 bytes |
コンパイル時間 | 2,526 ms |
コンパイル使用メモリ | 201,616 KB |
最終ジャッジ日時 | 2025-01-10 22:34:58 |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 11 |
ソースコード
#line 2 "header.hpp"//%snippet.set('header')%//%snippet.fold()%#ifndef HEADER_H#define HEADER_H// template version 2.0using namespace std;#include <bits/stdc++.h>// varibable settingsconst long long INF = 1e18;template <class T> constexpr T inf = numeric_limits<T>::max() / 2.1;#define _overload3(_1, _2, _3, name, ...) name#define _rep(i, n) repi(i, 0, n)#define repi(i, a, b) for (ll i = (ll)(a); i < (ll)(b); ++i)#define rep(...) _overload3(__VA_ARGS__, repi, _rep, )(__VA_ARGS__)#define _rrep(i, n) rrepi(i, 0, n)#define rrepi(i, a, b) for (ll i = (ll)((b)-1); i >= (ll)(a); --i)#define r_rep(...) _overload3(__VA_ARGS__, rrepi, _rrep, )(__VA_ARGS__)#define each(i, a) for (auto &&i : a)#define all(x) (x).begin(), (x).end()#define sz(x) ((int)(x).size())#define pb(a) push_back(a)#define mp(a, b) make_pair(a, b)#define mt(...) make_tuple(__VA_ARGS__)#define ub upper_bound#define lb lower_bound#define lpos(A, x) (lower_bound(all(A), x) - A.begin())#define upos(A, x) (upper_bound(all(A), x) - A.begin())template <class T> inline void chmax(T &a, const T &b) { if ((a) < (b)) (a) = (b); }template <class T> inline void chmin(T &a, const T &b) { if ((a) > (b)) (a) = (b); }template <typename X, typename T> auto make_table(X x, T a) { return vector<T>(x, a); }template <typename X, typename Y, typename Z, typename... Zs> auto make_table(X x, Y y, Z z, Zs... zs) { auto cont = make_table(y, z, zs...); returnvector<decltype(cont)>(x, cont); }#define cdiv(a, b) (((a) + (b)-1) / (b))#define is_in(x, a, b) ((a) <= (x) && (x) < (b))#define uni(x) sort(all(x)); x.erase(unique(all(x)), x.end())#define slice(l, r) substr(l, r - l)typedef long long ll;typedef long double ld;using vl = vector<ll>;using vvl = vector<vl>;using pll = pair<ll, ll>;template <typename T>using PQ = priority_queue<T, vector<T>, greater<T>>;void check_input() { assert(cin.eof() == 0); int tmp; cin >> tmp; assert(cin.eof() == 1); }#if defined(PCM) || defined(LOCAL)#else#define dump(...) ;#define dump_1d(...) ;#define dump_2d(...) ;#define cerrendl ;#endif#endif /* HEADER_H *///%snippet.end()%#line 2 "solve.cpp"template<class T=ll> using vec = vector<T>;struct Fast { Fast() { std::cin.tie(0); ios::sync_with_stdio(false); } } fast;int solve() {ll n,x;cin>>n>>x;dump(x);vector<ll> a(n);map<ll, ll> cnt;rep(i, n) {cin>>a[i];cnt[a[i]]++;}dump(a);ll ans = 0;for (auto& [k, c] : cnt){// c * cnt[x^k]if (k == (x^k)){ans += c * (c-1) / 2;}else{if (k < (x^k)) continue;ans += c * cnt[x^k];}}cout << ans << endl;return 0;}int main(){/*{{{*/solve();check_input();return 0;}/*}}}*/