59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic 
    int index = -1;
    for(int i=0; i<n-1; i++)
    {
        if(*(mem+i+1)-*(mem+i) == 1)
        {
            if(*(mem+i+2)-*(mem+i+1) == 1)
            {
                index = i; 
                break;
            }    
        }
    }
    if(index > -1)
        return index;
    else
        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;
}