Frecuency of Numbers In Array.c

#include<stdio.h>
int main()
{
	int n;
	scanf("%d",&n);
	int a[50], b[50];
	printf("The elements are\n");
	int i,j;
	for(i=0;i<n;i++)
	{
		scanf("%d",&a[i]);
		b[i] = -1;
	}
	for(i=0;i<n;i++)
	{
		int count = 1;
		for(j=i+1;j<n;j++)
		{
			if(a[i] == a[j])
			{
				count++;
				b[j] = 0;
			}
		}
		if(b[i]!=0)
		{
			b[i] = count;
		}
	}
	printf("Frequencies are:\n");
	for(i=0;i<n;i++)
	{
		if(b[i]!=0)
		{
			printf("%d occurence is : %d\n", a[i],b[i]);
		}
	}
	return 0;
}