用 Python 编写程序来计算列表中每个元素的连接对之和?\
pythonserver side programmingprogramming更新于 2026/2/16 10:20:17
假设我们有一个名为 nums 的数字列表。我们必须计算 nums 中每对数字的连接对之和。这里,对 (i, j) 和对 (j, i) 被视为不同。
因此,如果输入为 nums = [5, 3],则输出将为 176,因为我们有以下连接:(nums[0] + nums[0]) = (5 concat 5) = 55,(nums[0] + nums[1]) = (5 concat 3) = 53,(nums[1] + nums[0]) = (3 concat 5) = 35,(nums[0] + nums[0]) = (3 concat 3) = 33,则总和为 55 + 53 + 35 + 33 = 176
为了解决这个问题,我们将遵循以下步骤:
memo := a new map nums1 := nums temp := 0 c := sum of all elements in nums1 a := size of nums for i in range 0 to a, do if nums[i] is same as 0, then temp := temp + c otherwise, if nums[i] is present in memo, then temp := temp + memo[nums[i]] otherwise, b := 0 for j in range 0 to a, do b := b + integer of (nums[i] concatenate nums1[j]) memo[nums[i]] := b temp := temp + memo[nums[i]] return temp
让我们看看以下实现以便更好地理解:
示例
class Solution:
def solve(self, nums):
memo = {}
nums1 = nums
temp = 0
c = sum(nums1)
a = len(nums)
for i in range(a):
if nums[i] == 0:
temp += c
else:
if nums[i] in memo:
temp += memo[nums[i]]
else:
b = 0
for j in range(a):
b += int(str(nums[i]) + str(nums1[j]))
memo[nums[i]] = b
temp += memo[nums[i]]
return temp
ob = Solution()
nums = [5, 3]
print(ob.solve(nums))
输入
[5, 3]
输出
176
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python 参考教程 - 该教程包含有关 python 的更多信息:https://www.cainiaomax.com/python/

