#include<bits/stdc++.h>
using namespace std;
int main(){
    int n; cin >> n;
    vector<int> c,l;
    for(int i = 0 ; i < n ; i++){
        int x; cin >> x;
        if(x % 2 ==0){
            c.push_back(x);
        }
        else{
            l.push_back(x);
        }
    }
    if(c.size() % 2 == 0){
        cout << "YES";
    }
    else{
        for(int x : c){
            for(int y : l){
                if(abs(y - x) == 1){
                    cout << "YES";
                    return 0;
                }
            }
        }
        cout << "NO";
    }
}
 

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