Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

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

    while(i < n - 2)
    {
        if(*(mem + i + 1) == *(mem + i) + 1)
        {
            if(*(mem + i + 2) == *(mem + i + 1) + 1)
            {
                return i;
            }
            else
                i += 2;
        }
        else
            i++;
    }
    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;
}

Solving Approach