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: Wrong Answer)

#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#define rep(index,num) for(int index=0;index<num;index++)
#define eps 1e-15
typedef long long ll;
int main(){
	char s[101];
	int count[26]={0};
	int ok=1;
	scanf("%s",s);
	rep(i,100){
		if(s[i]=='\0') break;
		else count[s[i]-'a']++;
	}
	rep(i,26){
		if(count[i]%2==1){
			ok=0;
			break;
		}
	}
	if(ok==1) printf("YES\n");
	else printf("NO\n");
	return 0;
}