3872606_wa.c

北大大牛代码 1240道题的原代码 超级权威

#include <stdio.h>
#include <string.h>

int n;
int a[101];

int main()
{
	int i, t, r;

	while (scanf("%d", &n) == 1 && n != 0)
	{
		memset(a, 0, sizeof(a));
		r = n % 2;
		for (i = 0; i < n; i++)
		{
			scanf("%d", &t);
			a[t]++;
		}
		for (i = 0; i < 101; i++)
		{
			if (a[i] != 0 && a[i] != 2)
			{
				r = 1;
				break;
			}
		}
		printf("%d\n", r);
	}
	return 0;
}