cbj

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#pragma warning(disable:4996)
typedef long long LL;
typedef unsigned long long ULL;
int arr[114514] = { 0 };
int cmpi32(const void *p, const void *q){
    int a = *(int *)p, b = *(int *)q;
    if(a > b)return 1;
    else if(a < b)return -1;
    else return 0;
}
int main(){
#ifdef _DEBUG
    FILE *fp = freopen("../../../input.txt", "r", stdin);
    //FILE *fp2 = freopen("../../../o5.txt", "w", stdout);
#endif // _DEBUG
    int n, i;
    scanf("%d", &n);
    for(i = 1; i <= n; i++){
        scanf("%d", arr + i);
    }
    if(n == 1){
        puts("1");
        return 1;
    }
    qsort(arr + 1, n, sizeof(int), cmpi32);
    int cnt = 0, ans = 0;
    for(i = 1; i <= n + 1; i++){
        if(arr[i] != arr[i - 1]){
            ans += (cnt & 1);
            cnt = 1;
        }
        else{
            cnt += 1;
        }
    }
    printf("%d\n", ans);
#ifdef _DEBUG
    freopen("CON", "r", stdin);
    //freopen("CON", "w", stdout);
    system("pause");
#endif // _DEBUG
    return 0;
}