• + 1 comment

    O(n): function birthday(s, d, m) { // Write your code here let count = 0; for (let i=0; i 0 ? s[i-1]: 0); if (i == m -1 && s[i] == d) { count += 1 } if (i > m - 1 && s[i] - s[i-m] == d) { count += 1 } } return count; }