#include <iostream>

int main() {
    int data[] = {10, 40, -1, 50, 20, 70, 80, -1, 90};
    int size = sizeof(data) / sizeof(data[0]);

    int writeIndex = 0;

    int maxsize = 3;
    
    for (int i = 0; i<size; i++) 
    {
        if(data[i] >= 50) 
        {
            if(writeIndex < maxsize) 
            {
                data[writeIndex++] = data[i];
            }
            else 
            {
                for(int k = 0; k<maxsize; k++) 
                {
                    data[k] = data[k+1];
                }
                data[maxsize-1] = data[i];
            }
        }
    }

    for(int j = 0; j<writeIndex; j++) 
    {
        printf("%d ",data[j]);
    }
    printf("\ncount = %d", writeIndex);


    
    
}