Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int *p = mem;

    while (p <= mem + n - 3) {
        if (*(p+1) == *p + 1 && *(p+2) == *p + 2) {
            return p - mem;  
        }
        p++;
    }

    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;
}