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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main() {
  int i;
  int alphabet[26] = {};
  char input_str[101];
  scanf("%s", input_str);
  for(i = 0; i < strlen(input_str); i++) {
    alphabet[input_str[i]-'a']++;
  }
  for(i = 0; i < 26; i++) {
    if(alphabet[i] % 2 != 0) {
      i--;
      printf("No\n");
      break;
    }
  }
  if(i == 26) {
    printf("Yes\n");
  }
  return 0;
}