59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int count = 0;
    mem++;

    for(int i = 1; i < n; i++, mem++)
    {
        if(*mem == (*(mem - 1)) + 1) {
            count++;
        } else {
            count = 0;
        }
        if(count == 2)
            return(i - 2);
    }
    return -1;
}

int main() {
    int n, arr[100];
    scanf("%d", &n);

    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int res = find_pattern(arr, n);
    printf("%d", res);

    return 0;
}