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 currentDiff = 0, lastDiff = -1, count = 0;
	for(int i = 0; i < n; i++){
		currentDiff = *(mem + i) - *(mem + i + 1);
		
		if(currentDiff == 1){
			lastDiff = currentDiff;
		}

		if(lastDiff == currentDiff){count++;}
		else{count = 0;}

		if(count == 2){
			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;
}