結果

問題 No.2895 Zero XOR Subset
ユーザー nullnull
提出日時 2024-09-20 22:20:47
言語 C++23
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,766 bytes
コンパイル時間 10,443 ms
コンパイル使用メモリ 530,688 KB
実行使用メモリ 6,948 KB
最終ジャッジ日時 2024-09-20 22:21:05
合計ジャッジ時間 15,214 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
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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
6,812 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 WA -
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 WA -
testcase_07 AC 2 ms
6,944 KB
testcase_08 WA -
testcase_09 WA -
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,944 KB
testcase_12 WA -
testcase_13 WA -
testcase_14 AC 2 ms
6,940 KB
testcase_15 WA -
testcase_16 WA -
testcase_17 AC 2 ms
6,940 KB
testcase_18 WA -
testcase_19 WA -
testcase_20 AC 2 ms
6,940 KB
testcase_21 AC 2 ms
6,944 KB
testcase_22 WA -
testcase_23 AC 2 ms
6,940 KB
testcase_24 AC 2 ms
6,940 KB
testcase_25 WA -
testcase_26 WA -
testcase_27 AC 3 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 2 ms
6,940 KB
testcase_36 WA -
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ソースコード

diff #

/*
このコード、と~おれ!
Be accepted!
∧_∧ 
(。・ω・。)つ━☆・*。
⊂   ノ    ・゜+.
 しーJ   °。+ *´¨)
          .· ´¸.·*´¨) ¸.·*¨)
		            (¸.·´ (¸.·'* ☆
*/

#include <cstdio>
#include <algorithm>
#include <string>
#include <cmath>
#include <cstring>
#include <vector>
#include <numeric>
#include <iostream>
#include <random>
#include <map>
#include <unordered_map>
#include <queue>
#include <regex>
#include <functional>
#include <complex>
#include <list>
#include <cassert>
#include <iomanip>
#include <set>
#include <stack>
#include <bitset>
#include <array>
#include <chrono>
#include <unordered_set>

//#pragma GCC target("arch=skylake-avx512")
//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
//#pragma GCC target("sse4")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define repeat(i, n, m) for(int i = n; i < (m); ++i)
#define rep(i, n) for(int i = 0; i < (n); ++i)
#define printynl(a) printf(a ? "yes\n" : "no\n")
#define printyn(a) printf(a ? "Yes\n" : "No\n")
#define printYN(a) printf(a ? "YES\n" : "NO\n")
#define printim(a) printf(a ? "possible\n" : "imposible\n")
#define printdb(a) printf("%.50lf\n", a)
#define printLdb(a) printf("%.50Lf\n", a)
#define printdbd(a) printf("%.16lf\n", a)
#define prints(s) printf("%s\n", s.c_str())
#define all(x) (x).begin(), (x).end()
#define deg_to_rad(deg) (((deg)/360.0L)*2.0L*PI)
#define rad_to_deg(rad) (((rad)/2.0L/PI)*360.0L)
#define Please return
#define AC 0
#define manhattan_dist(a, b, c, d) (abs(a - c) + abs(b - d))

using ll = long long;
using ull = unsigned long long;

constexpr int INF = 1073741823;
constexpr int MINF = -1073741823;
constexpr ll LINF = ll(4661686018427387903);
constexpr ll MOD = 1e9 + 7;
constexpr ll mod = 998244353;
constexpr long double eps = 1e-14;
const long double PI = acosl(-1.0L);

using namespace std;

void scans(string& str) {
	char c;
	str = "";
	scanf("%c", &c);
	if (c == '\n')scanf("%c", &c);
	while (c != '\n' && c != -1 && c != ' ') {
		str += c;
		scanf("%c", &c);
	}
}

void scanc(char& str) {
	char c;
	scanf("%c", &c);
	if (c == -1)return;
	while (c == '\n') {
		scanf("%c", &c);
	}
	str = c;
}

double acot(double x) {
	return PI / 2 - atan(x);
}

ll LSB(ll n) { return (n & (-n)); }

template<typename T>
inline T chmin(T& a, const T& b) {
	if (a > b)a = b;
	return a;
}

template<typename T>
inline T chmax(T& a, const T& b) {
	if (a < b)a = b;
	return a;
}

//cpp_int
#if __has_include(<boost/multiprecision/cpp_int.hpp>)
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using namespace boost::multiprecision;
#else
using cpp_int = ll;
#endif

//atcoder library
#if __has_include(<atcoder/all>)
#include <atcoder/all>
//using namespace atcoder;
#endif

/*
	random_device seed_gen;
	mt19937 engine(seed_gen());
	uniform_int_distribution dist(1, 100);
*/


/*----------------------------------------------------------------------------------*/


const int MAX_BITS = 60;
vector<ll> basis(MAX_BITS, 0);  // Linear basis array of size 60
vector<int> basis_idx(MAX_BITS); // To store one index corresponding to each basis vector

// Function to insert number into the basis
bool insertBasis(ll x, int idx) {
    for (int i = MAX_BITS - 1; i >= 0; --i) {
        if (!(x & (1LL << i))) continue; // Skip if bit is not set

        if (!basis[i]) {  // If this bit is not yet in the basis
            basis[i] = x;
            basis_idx[i] = idx;  // Store the index of this element
            return true;         // Inserted successfully
        }

        // Reduce x by the basis element
        x ^= basis[i];
    }
    // If x becomes 0, it means this element is a combination of basis elements
    vector<int> result;  // To store the indices involved
    for (int i = MAX_BITS - 1; i >= 0; --i) {
        if (x & (1LL << i)) result.push_back(basis_idx[i]);
    }
    result.push_back(idx);

    // Output the result indices
    printf("%d\n", (int)result.size());
    for (int i : result) {
        printf("%d ", i + 1);  // Output 1-based index
    }
    printf("\n");
    return false;  // This element was not added to the basis
}

int main() {
    int n;
    scanf("%d", &n);
    vector<ll> a(n);

    // Input the array
    for (int i = 0; i < n; ++i) {
        scanf("%lld", &a[i]);
    }

    // Insert each element into the basis
    for (int i = 0; i < n; ++i) {
        if (!insertBasis(a[i], i)) {
            return 0;  // Found a subset that XORs to zero, so stop
        }
    }

    // If no zero XOR subset was found, output -1
    puts("-1");
    return 0;
}
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