Submission #521802

#	Time	Username	Problem	Language	Result	Execution time	Memory
521802		maks007	XOR Sum (info1cup17_xorsum)	C++14	0 / 100	1681 ms	4404 KiB

xorsum

#include <bits/stdc++.h>

using namespace std;

int main(void) {
	int n;
	cin>> n;
	map <int,int> mp;
	vector <int> a(n);
	for(int i = 0; i < n; i ++ ) {
		cin >> a[i];
	}
	int ans = 0;
	for(int i = 0; i < n; i ++) {
		if(mp[a[i]]) {
			ans ^= mp[a[i]];
			continue;
		}
		int sum = 0;
		for(int j = i; j < n; j ++) {
			sum ^= (a[i] + a[j]);
		}
		mp[a[i]] = sum;
		ans ^= sum;
	}
	cout << ans;
	return false;
}

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