for j in range(1, i + 1): square: int = j * j if square > i: break dp[i] = min(dp[i], dp[i - square] + 1) return dp 代码(Go) func numSquares(n int) int { // dp[i] 表示 i 最少能表示成 dp[i] 个完全平方数之和。 // 初始化为 n + 1 ,
Leetcode May Challenge - 05/22: Sort Characters By Frequency(Python) 题目描述 Given a string, sort it in decreasing order based on the frequency of characters. 例子 Example 1: Example 2: Example 3: 解释 给一个字符串,把字符按照出现的次数排序。所有相同的字母需要连在一起。 思路 用字典统计...
Python3代码 classSolution:defnumSquares(self, n:int) ->int:# solution two: Lagrange's Four-square Theoremwhilen %4==0:# reduce nn /=4ifn %8==7:return4a =0whilea **2<= n: b =int((n - a **2) **0.5)ifa **2+ b **2== n:return(notnota) + (notnotb)# whether a an...
publicclassSolution{/** * @param n: a positive integer * @return: An integer */publicintnumSquares(intn) {// write your code hereint[] f = newint[n +1];for(inti =0; i <= n; i++) { f[i] = i;// max square number is i itself with all 1for(intj =1; j * j <= ...
思路:直接使用二分法,貌似没啥好说的。代码如下: 1classSolution(object):2defisPerfectSquare(self, num):3"""4:type num: int5:rtype: bool6"""7left, right =0, num8whileleft <=right:9mid = (left+right) / 210ifmid ** 2 ==num:11returnTrue12elifmid ** 2 <num:13left = mid + 114...
题目描述: Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. For example, given n = 12, return 3 because 12 = 4 + 4 + 4; given n = 13, return 2 because 13 =...
GivenNaxis-aligned rectangles whereN>0,determineifthey all together form an exact coverofa rectangular region.Each rectangle is representedasa bottom-left point and a top-right point.For example,a unit square is representedas[1,1,2,2].(coordinateofbottom-left pointis(1,1)and top-right point...
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25 is a valid perfect square True 23 is a valid perfect square False Conclusion In this post, we saw one of the coding questions that are usually asked in interviews. Let us know how you would approach this problem in the comment section below. Happy coding!
Given a positive integern, find the least number of perfect square numbers (for example,1, 4, 9, 16, ...) which sum ton. Example 1: 1212=4+4+4. Example 2: 1313=4+9. classSolution(object):defnumSquares(self, n):""":type n: int ...