Coding Challenges < Python >

def find_combinations(nums, target):
    if target == 0:
        return [[]]
    if target < 0 or not nums:
        return []
    
    result = []
    for i, num in enumerate(nums):
        if i > 0 and nums[i] == nums[i-1]:
            continue
        if num > target:
            break
        combinations = find_combinations(nums[i+1:], target - num)
        for combo in combinations:
            result.append([num] + combo)
    
    return result

nums = [2, 3, 6, 7]
target = 7
combinations = find_combinations(nums, target)
for combo in combinations:
    print(combo)