View Code
#include <stdio.h>
#include <string.h>
int main()
{
int m, n;
int k = 0;
int ticket[10001];
while (scanf("%d %d", &m, &n))
{
int i = 1;
if (!m && !n)
{
break;
}
memset(ticket, 0, sizeof(ticket));
int tmp;
for (i = 1; i <= n; i++)
{
scanf("%d", &tmp);
ticket[tmp]++;
}
for (i = 1; i <= m; i++)
{
if (ticket[i] > 1)
{
k++;
}
}
printf("%d\n", k);
}
return 0;
}