59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic here
    int index = 0;
    while(n-2){
        if(*mem == (*(mem+1)-1)){
            if(*(mem+1) == (*(mem+2)-1))
            {
                return index;
            }
        }
        mem++;
        index++;
        n--;
    }
    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;
}