59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic here
    for (int i = 0; i < n - 2; i++) {
        int *next = mem + 1;
        int *last = mem + 2;
        if (*next == *mem + 1) {
            if (*last == *next + 1) {
                return i;
            }
        }
        mem++;
    }

    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;
}