Scan Memory for Three Consecutive Increasing Values

Code

#include <stdio.h>

int find_pattern(int *mem, int n) {
    for(int i=0;i<n-3;i++){
      if( *(mem+i)==*(mem+i+1)-1 && *(mem+i)==*(mem+i+2)-2){
        // printf("%d %d %d %dn",*(mem+i),*(mem+i+1)-1,*(mem+i+2)-2,i);
       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