Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic here
    if (n < 3) return -1;

    int *curr = mem;
    int *end = mem + n - 1;

    while (curr < end) {
        int val1 = *(curr);
        int val2 = *(curr + 1);
        int val3 = *(curr + 2);

        if ((val2 - val1 == 1) && (val3 - val2 == 1))
            return curr - mem;

        curr++;
    }
    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