main.py

arr = [1, 2, 3, 3, 5, 6, 6, 8, 9, 10]

left, right = 0, 9

target = 8
answer = -1

while left <= right:
    mid = (left + right) // 2
    if arr[mid] >= target:
        answer = mid
        right = mid - 1
    else:
        left = mid + 1

print(answer) # 7