Submission #4030957


Source Code Expand

#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <cmath>
#include <iomanip>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <bitset>
#include <cassert>
#include <cstring>
#include <climits>

using namespace std;

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define SORT(c) sort((c).begin(), (c).end())

typedef long long ll;
typedef pair<int, int> P;
typedef vector<int> V;
typedef map<int, int> M;

constexpr ll INF = 1e18;
constexpr ll MOD = 1e9 + 7;
constexpr double PI = 3.14159265358979323846;
constexpr int dx[] = {0, 0, 1, -1};
constexpr int dy[] = {1, -1, 0, 0};

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, a[112345];
    int x = 0;

    cin >> n;
    REP(i, n)
    {
        cin >> a[i];
        x ^= a[i];
    }

    int res = 0;

    for (int i = 30; i >= 0; i--)
    {
        if (!(x & (1 << i)))
            continue;

        REP(j, n)
        {
            if ((a[j] ^ (a[j] - 1)) == (1 << (i + 1)) - 1)
            {
                res++;
                a[j] = 0;
                x ^= (1 << (i + 1)) - 1;

                break;
            }
        }
    }

    if (x == 0)
        cout << res << endl;
    else
        cout << -1 << endl;

    return 0;
}

Submission Info

Submission Time
Task C - Cheating Nim
User Kats
Language C++14 (GCC 5.4.1)
Score 500
Code Size 1417 Byte
Status AC
Exec Time 12 ms
Memory 640 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 2
AC × 26
Set Name Test Cases
Sample example0.txt, example1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, example0.txt, example1.txt
Case Name Status Exec Time Memory
000.txt AC 1 ms 256 KB
001.txt AC 1 ms 256 KB
002.txt AC 12 ms 640 KB
003.txt AC 5 ms 512 KB
004.txt AC 5 ms 512 KB
005.txt AC 4 ms 384 KB
006.txt AC 11 ms 640 KB
007.txt AC 11 ms 640 KB
008.txt AC 11 ms 640 KB
009.txt AC 11 ms 640 KB
010.txt AC 11 ms 640 KB
011.txt AC 11 ms 640 KB
012.txt AC 11 ms 640 KB
013.txt AC 11 ms 640 KB
014.txt AC 11 ms 640 KB
015.txt AC 11 ms 640 KB
016.txt AC 11 ms 640 KB
017.txt AC 11 ms 640 KB
018.txt AC 11 ms 640 KB
019.txt AC 11 ms 640 KB
020.txt AC 11 ms 640 KB
021.txt AC 2 ms 256 KB
022.txt AC 2 ms 256 KB
023.txt AC 11 ms 640 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB