Timus Problem 1313 Solution
#include<stdio.h>
int main()
{
int a[155],b[155],nn;
int n,i,j,count,h,k,m=0;
scanf("%d\n",&n);
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
for (i=0;i<n;i++)
{
count=0;
for (j=0;j<n;j++)
{
if (a[i]==a[j])
count++;
}
if (count>=4)
{
h=0;
for(k=0;k<i;k++)
{
if(a[i]!=a[k])
h++;
}
if (h==i)
{
(b[m++]==a[i]);
}
}
}
nn=m;
printf("%d",nn);
return 0;
}