Submission #1149369

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149369		arsen23	XOR Sum (info1cup17_xorsum)	C++20	7 / 100	1695 ms	8260 KiB

xorsum

#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define pb push_back
#define F first
#define S second
#define in insert

using namespace std;
typedef long long ll;

typedef unsigned long long ull;

const int N = 1e6 + 123;

const int P = 320;

const int mod = 1e9 + 7;

ll n, m, k;

ll a[N];

ll t[N * 4];

void salemkhan() {
	cin >> n;
	
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	
	ll s = a[1] + a[1];
	
	for(int i = 1; i <= n; i++) {
		for(int j = i; j <= n; j++) {
			if(i == j && i == 1) continue;
			
			s ^= a[i] + a[j];
		}
	}
	
	cout << s;
}

	
// 28 37 48 49 55 56 57 58 67 9

// 9 + 1 +

int main() {

    //freopen("knight.in",   "r", stdin);

    //freopen("knight.out", "w", stdout);

    ios_base::sync_with_stdio(0);

    cin.tie(0);

    cout.tie(0);

    ll tt = 1;

    //cin >> tt;

    while(tt--) {
        salemkhan();
    }
}

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