Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n)
{
    for (int i = 0; i <= n - 3; i++)
    {
        int r1 = *(mem + 1) - *mem;
        int r2 = *(mem + 2) - *(mem + 1);

        if (r1 == 1 && r2 == 1)
        {
            return i;   // starting index of consecutive sequence
        }

        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;
}

Solving Approach