Submission #521806

#	Time	Username	Problem	Language	Result	Execution time	Memory
521806		maks007	XOR Sum (info1cup17_xorsum)	C++14	0 / 100	1683 ms	8268 KiB

xorsum

#include <bits/stdc++.h>
 
using namespace std;
 
int main(void) {
	int n;
	cin>> n;
	vector <int> a(n);
	vector <int> idx((int)1e6, 0);
	for(int i = 0; i < n; i ++ ) {
		cin >> a[i];
		idx[a[i]] ++;
	}
	sort(a.begin(), a.end());
	a.erase(unique(a.begin(), a.end()), a.end());
	int ans = 0;
	for(int i = 0; i < n; i ++) {
		for(int j = i; j < n; j ++) {
			if(idx[a[j]] % 2 == 1)
				ans ^= (a[i] + a[j]);
			else continue;
		}
	}
	cout << ans;
	return false;
}

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