#include <stdio.h> 

int main(void) { 

    /* int numbers[13] = {1, 15, 7, 3, 8, 8, 19, 5, 12, 8, 2, 6, 8}; */
    int numbers[13] = {1, 15, 8, 8, 8, 8, 7, 3, 19, 5, 12, 2, 6};
   
    int counter = 1;
    int index = 0;
    int prev, next;
    int length = sizeof(numbers)/sizeof(int);

    if (length > 0) { 
        prev = numbers[index++];
    }
 
    while (index < length && counter < 4) {
        next = numbers[index++];
        if (prev == next) counter++;
        else {
            counter = 1;
            prev = next;
        }
    }
 
    if (counter == 4) 
        printf("Found four times repeated number");
    else 
       printf("No four times repeated number found");
       
    return 0;

}