Can you solve this real interview question? Binary Subarrays With Sum - Given a binary array nums and an integer goal, return the number of non-empty subarrays with a sum goal. A subarray is a contiguous part of the array. Example 1: Input: nums =
public int numSubarraysWithSum(int[]A,intS) { return atMost(A,S) - atMost(A,S- 1); } private int atMost(int[]A,intS) { if (S< 0) return 0; int res = 0, n =A.length; for (inti= 0,j= 0;j<n; ++j) {S-=A[j]; while (S< 0)S+=A[i++]; res += j - i...
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)...
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] =...
Explanation: There are 7 subarrays with a sum divisible by K = 5:[4, 5, 0, -2, -3, 1], [5], [5, 0], [5, 0, -2, -3], [0], [0, -2, -3], [-2, -3]Note:数组最长30000。如果O(n^2) 那时间委实长久。1 <= A.length <= 30000-10000 <= A[i] <= 100002 <=...
【LeetCode】3186. Maximum Total Damage With Spell Casting 17:36 【LeetCode】3193. Count the Number of Inversions 46:21 【LeetCode】3097. Shortest Subarray With OR at Least K II 09:21 【LeetCode】 3097. Shortest Subarray With OR at Least K II 09:21 【LeetCode】3161. Block Placem...
第一种是prefix sum + 双指针。 例如Minimum Size Subarray Sum - LeetCode: Given an array of n positive integers and a positive integers, find the minimal length of a contiguous subarray of which the sum ≥s. If there isn't one, return 0 instead. 用O(N)时间得到一个prefix sum array,可...
定义两个指针left和right,分别记录子数组的左右的边界位置,然后我们让right向右移,直到子数组和大于等于给定值或者right达到数组末尾,此时我们更新最短距离,并且将left像右移一位,然后再sum中减去移去的值,然后重复上面的步骤,直到right到达末尾,且left到达临界位置,即要么到达边界,要么再往右移动,和就会小于给定值。
给定一个正整数数组 nums和一个整数 k,返回 nums 中「好子数组」 的数目。 如果nums 的某个子数组中不同整数的个数恰好为 k,则称 nums 的这个连续、不一定不同的子数组为 「好子数组 」。 例如,[1,2,3,1,2] 中有3 个不同的整数:1,2,以及 3。 子数组 是数组的 连续 部分。 示例1: 输入:nums...
1186 Maximum Subarray Sum with One Deletion 删除一次得到子数组最大和 Description: Given an array of integers, return the maximum sum for a non-empty subarray (contiguous elements) with at most one element deletion. In other words, you want to choose a subarray and optionally delete one element...