59. Scan Memory for Three Consecutive Increasing Values

#include <stdio.h>

int find_pattern(int *mem, int n) { 
    for (int i = 0; i < (n - 2); i++) {
        if ((mem[i + 1] == mem[i] + 1) && (mem[i + 2] == mem[i] + 2)) {
            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;
}