Submission #1512966

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Source Code Expand

#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
#include<cstdlib>
#include <cmath>
#include<stdio.h>
#include<queue>
#include<stack>
#include<set>
#define ll long long
#define MAX 1000000000000000000LL
ll inf=100000000000007;
using namespace std;

int main(){
    int n;cin>>n;
    vector<int> v;
    int a;
    for(int i=0; i<n; i++){
        cin>>a;
        v.push_back(a);
    }
    sort(v.begin(),v.end());
    int type=1;
    for(int i=1; i<n; i++){
        if(v[i-1]!=v[i])type++;
    }
    int ans=(type/2)*2;
    cout<<ans<<endl;
    return 0;
}

Submission Info

Judge Result