Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

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