Zero Duplicates

QUESTION:
Write a program that will read in a list of numbers and will then print out the same list except numbers that have already been printed will be printed as a zero instead.
Input Format:
Input consists of n+1 integers where n is the number of elements in the list. The first integer corresponds to n. The remaining n integers correspond to the elements in the list.
Assume that the maximum value of n is 100.

Output Format:
Output consists of n integers on separate lines.

Sample Input :
5
2
3
4
3
6

Sample Output:
2
3
4
6

SOLUTION:
#include<stdio.h>
int main()
{
    int n,a[100],i,j,c;
    scanf("%d",&n);
    for(i=0;i<n;i++)
        scanf("%d",&a[i]);
    for(i=0;i<n;i++)
    {
        c=0;
        for(j=0;j<i;j++)
        {
            if(a[i]==a[j])
            {
                c=1;
                break;
            }
        }
        if(c==1)
            printf("0\n");
        else
            printf("%d\n",a[i]);
    }
    return 0;
}

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