c_assignment.c

#include <stdio.h>

int find(int, int);
int main()
{
    int n, k;
    scanf("%d %d", &n, &k);
    int c = find(n,k);
    printf("%d\n", c);
}

int find(int n, int k)
{   
    int number, i=0, count=0, index=-1; 
    while(scanf(" %d", &number) && number!=-1) 
    {      
        
        if(number==n)
        {
            index=i;
            if(++count ==k) break;
        } 
        i++;         
        
    }
    if (count!=k) return -1;
    return index;
}