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 idx = 0;
    int cnt = 1;

    for (int i = 1; i < n; ++i){
        if (cnt == 3) return idx;
        if (*(mem + i) == (*(mem + i - 1) + 1)){
            ++cnt;
        } else {
            cnt = 1;
            idx = 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