59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int i;

    for (i = 0; i < (n - 2); i++, mem++) {
            if (
                (*(mem + 1) - *(mem + 0) == 1) &&
                (*(mem + 2) - *(mem + 1) == 1)
            )
                return 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;
}