Problem:
Score : 200 points

Problem Statement

Let w be a string consisting of lowercase letters.
We will call w beautiful if the following condition is satisfied:

Each lowercase letter of the English alphabet occurs even number of times in w.

You are given the string w. Determine if w is beautiful.

Constraints

1 \leq |w| \leq 100

w consists of lowercase letters (a-z).

Input

The input is given from Standard Input in the following format:

w

Output

Print Yes if w is beautiful. Print No otherwise.

Sample Input 1

abaccaba

Sample Output 1

Yes

a occurs four times, b occurs twice, c occurs twice and the other letters occur zero times.

Sample Input 2

hthth

Sample Output 2

No

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <bits/stdc++.h>

#define INF 1e9
using namespace std;
typedef long long ll;

int main() {

    string w; cin >> w;

    int a[30] = {};

    for (int i = 0; i < w.size(); ++i) {
        ++a[w[i] - 'a'];
    }

    for (int i = 0; i < 30; ++i) {
        if (a[i] % 2 != 0) {
            puts("No");
            return 0;
        }
    }

    puts("Yes");
}