Submission #889394

#	Time	Username	Problem	Language	Result	Execution time	Memory
889394		boris_mihov	XOR Sum (info1cup17_xorsum)	C++17	7 / 100	1687 ms	5324 KiB

xorsum

#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>

typedef long long llong;
const int MAXN = 1000000 + 10;
const int MAXLOG = 30;

int n;
int cnt[2];
int a[MAXN];
int b[MAXN];
int c[MAXN];
int perm[MAXN];
int perm2[MAXN];
int answer;

void solve()
{
    for (int i = 1 ; i <= n ; ++i)
    {
        for (int j = i ; j <= n ; ++j)
        {
            answer ^= a[i] + a[j];
        }
    }

    std::cout << answer << '\n';
}

void input()
{
    std::cin >> n;
    for (int i = 1 ; i <= n ; ++i)
    {
        std::cin >> a[i];
    }
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}  

int main()
{
    fastIOI();
    input();
    solve();

    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23