问题: Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution set must not contain duplicate quadruplets. For ex…
题目难度:Medium 题目: Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution set must not contain duplicate quadrup…
Python的内置方法 str.center(width [, fillchar]) 就能轻而易举打印出来:str即是数量不等的星号,width即是最大宽度(7个空格),默认填充字符fillchar就是空格.两个for循环搞定!代码如下: 1 2 3 4 5 s = '*' for i in range(1, 8, 2): print((s*i).center(7)) for i in reversed(range(1, 6, 2)): print((s*i).center(7)…
Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending order.…
Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: Elements in a quadruplet (a,b,c,d) must be in non-descending order.…