Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic here
    int *end = mem + n - 2; // stop trước 2 phần tử cuối
    for (int *p = mem; p < end; p++) {
        if (*(p+1) == *p + 1 && *(p+2) == *(p+1) + 1)
            return p - mem;  // chuyển pointer về index
    }
    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