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Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n) {
    // Write your pointer-based logic here
    
    for(int i = 0; i<n; i++){

    int *ptr1 = mem + i;
    int *ptr2 = mem + 1 + i;
    int *ptr3 = mem + 2 + i;

        if ((*ptr2 == *ptr1 + 1) && (*ptr3 == *ptr2 + 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;
}

Solving Approach

 

 

 

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Input

8 2 4 5 6 9 11 12 14

Expected Output

1