結果
問題 | No.2895 Zero XOR Subset |
ユーザー | 矢澤式WINTER |
提出日時 | 2024-09-20 22:27:48 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,628 bytes |
コンパイル時間 | 5,143 ms |
コンパイル使用メモリ | 318,704 KB |
実行使用メモリ | 17,536 KB |
最終ジャッジ日時 | 2024-09-20 22:29:08 |
合計ジャッジ時間 | 78,513 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | WA | - |
testcase_03 | AC | 1,953 ms
6,940 KB |
testcase_04 | AC | 1,952 ms
6,940 KB |
testcase_05 | AC | 1,952 ms
6,944 KB |
testcase_06 | WA | - |
testcase_07 | AC | 1,952 ms
6,944 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | AC | 1,952 ms
6,940 KB |
testcase_11 | AC | 1,952 ms
6,940 KB |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 1,952 ms
6,940 KB |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 1,953 ms
6,944 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | AC | 1,952 ms
6,940 KB |
testcase_21 | AC | 1,952 ms
6,940 KB |
testcase_22 | WA | - |
testcase_23 | AC | 1,953 ms
6,940 KB |
testcase_24 | AC | 1,952 ms
6,944 KB |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | AC | 1,952 ms
6,940 KB |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | AC | 1,952 ms
6,940 KB |
testcase_36 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; //*/ #include <atcoder/all> using namespace atcoder; // //*/ // #pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math") // #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt") // #pragma GCC target("avx,avx2,fma") // #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma") #define rep(i,n) for(int i=0;i<n;i++) #define Rep(i,a,b) for(int i=a;i<b;i++) #define ALL(x) (x).begin(),(x).end() #define dbgv(x); for(auto now : x) cout << now << " "; cout << endl; //using p = pair<int,int>; using ll = long long; using ull = unsigned long long; //*/ template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } typedef pair<int, int> pii; typedef pair<ll, ll> pll; typedef vector<ll> vll; typedef vector<int> vint; random_device rnd; mt19937 rng(rnd()); //数列のXOR基底を取る,計算量O(k^2N) const int k = 60; struct bitbase{ vector<long long> d; vint idx; bitbase():d(k),idx(k){} long long add(long long x,int is){ long long memo = x; x = tomin(x); //cerr << x << endl; //dbgv(d); if(x == 0) return -1; for(int i = k-1;i >= 0;i--){ if(x>>i&1){ for(int j = 0;j < k;j++)if(d[j]>>i&1){ d[j] ^= x; } d[i] = x; idx[i] = is; return memo; } } return memo; } vll make(long long x){ vll res; for(int i = k-1;i>=0;i--){ if(x >> i & 1){ res.push_back(idx[i]); } } return res; } long long tomin(long long x){ for(int i = k-1;i>=0;i--){ if(x >> i & 1) x ^= d[i]; } return x; } //今の数列から0個以上のXORで作れる数のうちi番目に小さいものを取得 //存在しない場合,-1を返す long long get_kth(long long _k){ long long res = 0LL; for(int i = 0;i < k;i++){ if(d[i]==0) continue; if(_k&1) res ^= d[i]; _k >>= 1; } if(_k != 0) return -1; else return res; } }; class Timer { public: Timer() { begin(); elapsed_time_ = 0.0; } void begin() { start_time_ = chrono::system_clock::now(); } double get_time() { chrono::system_clock::time_point end_time = chrono::system_clock::now(); elapsed_time_ = chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time_).count(); elapsed_time_ *= 1e-9; // nanoseconds -> seconds return elapsed_time_; } double get_last_time() const { return elapsed_time_; } bool yet(double time_limit) { return get_time() < time_limit; } double progress(double time_limit) { return get_time() / time_limit; } private: chrono::system_clock::time_point start_time_; double elapsed_time_; }; constexpr double time_limit = 1.95; map<ll,int> mp; void solve(){ Timer timer; int n; cin >> n; vll v(n); rep(i,n) cin >> v[i]; rep(i,n){ if(v[i] == 0){ cout << 1 << endl; cout << i+1 << endl; return; } if(mp[v[i]]!=0){ cout << 2 << endl; cout << mp[v[i]] << " " << i+1 << endl; return; } mp[v[i]] = i+1; } int n2 = min(60,n); vll vs2(n2); rep(i,n2) vs2[i] = v[i]; //cerr << n2 << endl; for(ll i = 0;i < (1LL<<n2);i++)if(i){ //cerr << i << endl; if(!(timer.yet(1.00))) break; ll now = 0; rep(j,n2){ if(i>>j&1)now^=vs2[j]; } //cerr << now << endl; if(now==0){ cout << __popcount(i) << endl; rep(j,n2)if(i>>j&1) cout << j+1 << " "; cout << endl; return; } } for(ll i = (1LL<<n2)-1;i > 0;i--){ if(!(timer.yet(time_limit))) break; ll now = 0; rep(j,n2){ if(i>>j&1) now ^= vs2[j]; } if(now==0){ cout << __popcount(i) << endl; rep(j,n2)if(i>>j&1) cout << j+1 << " "; cout << endl; return; } } cout << -1 << endl; } void solve2(){ int n; cin >> n; //cout << n << endl; ll ter = 0; rep(i,n-1){ ll tar = rng(); ter ^= tar; cout << tar << " "; } cout << ter << endl; } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int t = 1; //cin >> t; rep(testcase,t) solve(); }