public:intnumSubarraysWithSum(vector<int>& A,intS) {intres =0,sum=0, left =0, n = A.size();for(inti =0; i < n; ++i) {sum+= A[i];while(left < i &∑> S)sum-= A[left++];if(sum< S)continue;if(sum== S) ++res;for(intj = left; j < i && A[j] ==0; ++j)...
原题链接在这里:https://leetcode.com/problems/binary-subarrays-with-sum/ 题目: In an arrayAof0s and1s, how many non-empty subarrays have sumS? Example 1: Input: A =[1,0,1,0,1], S =2 Output:4 Explanation: The 4 subarrays are bolded below: [1,0,1,0,1] [1,0,1,0,1] [...
public int numSubarraysWithSum(int[] A, int S) { if (A.length == 0) return 0; int result = 0; int[] sumOne = new int[A.length]; int st = 0; int ed = 0; sumOne[0] = A[0] == 1 ? 1 : 0; for (int i = 1; i < A.length; i++) { sumOne[i] = A[i] =...
用hashmap处理即可,之前LeetCode上面有类似的题目,这次WA了一次,是put(0,0)了,应该put(0,1)的。 publicstaticintnumberOfSubarrays(int[]arr,int target){HashMap<Integer,Integer>map=newHashMap<>();int pre=0;map.put(0,1);int cnt=0;for(int i=0;i<arr.length;i++){pre+=arr[i];if(map....
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leetcode-1973-Count Nodes Equal to Sum of Descendants - Recursion 90 -- 9:28 App leetcode-508. Most Frequent Subtree Sum - Recursion 154 -- 15:13 App leetcode-2799. Count Complete Subarrays in an Array 109 -- 6:52 App leetcode-2750. Ways to Split Array Into Good Subarrays 15...
package leetcode import ( "github.com/halfrost/leetcode-go/structures" ) // TreeNode define type TreeNode = structures.TreeNode /** * Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */ func mergeTrees(root1 *TreeNode,...
第四章 LeetCode 题解 0001~0099 0100~0199 0200~0299 0300~0399 0400~0499 0500~0599 0600~0699 0700~0799 0800~0899 0900~0999 0901. Online Stock Span 0904. Fruit Into Baskets 0907. Sum of Subarray Minimums 0909. Snakes and Ladders 0910. Smallest Range I I 0911. Online Election 0914. X ...
0209-Minimum-Size-Subarray-Sum 0215-Kth-Largest-Element-in-an-Array 0219-Contains-Duplicate-II 0231-Power-Of-Two/Article 0234-isPalindrome 0237-Delete-Node-in-a-Linked-List 0239-Sliding-Window-Maximum 0242-Valid-Anagram 0260-Single-Number-III 0268-Missing-Number 0279-Perfect-Square...
so now we need to check whether there is a subarray of a new array ai−λ of length at least x+1 with non-negative sum, which is doable with some prefix sums.Continuous search¶Let f:R→R be a real-valued function that is continuous on a ...