这两段区间包括2在内的所有subarray的最小值都是2,其分别可以组成的subarry的个数是 len([3])和len([4,5]),左右区间合并在一起可以组成的subarray的个数是len([3])*len([4,5]),再加上2本身自己组成一个独立的subarray [2],其总数就是 len([3]) + len([4,5]) + len([3])*len([4,5]
Can you solve this real interview question? Sum of Subarray Minimums - Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, return the answer modulo 109 + 7. Ex
Given an array of integers arr, find the sum ofmin(b), wherebranges over every (contiguous) subarray ofarr. Since the answer may be large, return the answer modulo109 + 7. Example 1: Input:arr = [3,1,2,4]Output:17Explanation:Subarrays are [3], [1], [2], [4], [3,1], [...
this is some kind of stranger problem, please see the exa...[LeetCode] Sum of Subarray Minimums Description Sum of Subarray Minimums: Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, ...
907. Sum of Subarray Minimums Given an array of integers A, find the sum of min(B), where B ranges over every (contiguous) subarray of A. Since the answer may be large, return the answer modulo 10^9 + 7....
907. Sum of Subarray Minimums 难度:m class Solution: def sumSubarrayMins(self, A: List[int]) -> int: res = 0 stack = [] for i, n in enumerate(A): while stack and A[stack[-1][0]] >= n: stack.pop() if stack: si = n*(i-stack[-1][0])+stack[-1][1] ...
No.907 Sum of Subarray Minimums,907.子数组的最小值之和-力扣(LeetCode)(leetcode-cn.com)思路参考:【LeetCode】907.SumofSubarrayMinimums_哔哩哔哩_bilibili做过较多类似题目的话很容易就想到枚举每个数字将其作为最小数时计算其所包含的子数组个数,...
907. Sum of Subarray Minimums 信息门下皮卡丘 佛系皮卡丘 来自专栏 · Leetcode题解 Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, return the answer modulo 10**9 + 7. Example 1: Input: ...
Count of Range Sum(leetcode) Count of Range Sum Count of Range Sum 题目 题目解析 解决办法 sum数数 归并排序 题目 leetcode题目 Given an integer array nums, return the number of range sums that lie in [lower, upper] inclusive. Range sum S(i, j) is defi......
918. Maximum Sum Circular Subarray # 题目 # Given a circular array C of integers represented by A, find the maximum possible sum of a non-empty subarray of C. Here, a circular array means the end of the array connects to the beginning of the array. (Fo