Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n) {
    int streak = 0;
    for (int i = 1; i < n; i++){
        int prev = *(mem +i-1);
        int current = *(mem +i);
        if (current == prev +1){
            streak ++;
        }else{
            streak = 0;
        }
        if (streak == 2 ) return i-2;
    }
    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