Submission #4028440

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Source Code Expand

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	vector<int> a(100005);
	for(int i = 0; i < n; i++) {
		int x;
		cin >> x;
		a[x]++;
	}
	int even = 0, all = 0;
	for(int i = 1; i <= 100000; i++) {
		if(a[i] > 0) all++;
		if(a[i] % 2 == 0 && a[i] > 0) even++;
	}
	cout << (even % 2 == 0 ? all : all - 1) << endl;
	return 0;	
}

Submission Info

Judge Result