Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example:matrix...
classSolution{public:boolguess(vector<vector<int>>&matrix,intmid,intk){intsum=0;intn=matrix.size();for(inti=0;i<n;i++){intb=0;inte=n-1;intans=-1;while(b<=e){intm=(b+e)/2;if(matrix[i][m]<mid){ans=m;b=m+1;}else{e=m-1;}}sum+=(ans+1);}returnsum<k;}intkthSma...
3. insert (i+1,j) in the correct position in the array to maintain the sorting. 4. Keep doing 2 and 3 until k nodes are retrieved. klog(m) 2) matrix with unsorted rows (m) and columns (n): use quick selection to find the kth element (similar method to 1-D array) O(m*n)...
378. Kth Smallest Element in a Sorted Matrix 题目 Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: ...
根据给的matrix的性质,可以知道最小的element一定是在左上角的,接下来小的值是在这个值的右边还是在这个值的下面没有办法确定,这里维护的是一个size为k的minHeap,通过传统的BFS做法,不停地把当前值的下面的和左边的传入minHeap,因为minHeap会自动的把最小值放到最上面,所以poll k次就可以知道第k小的。这里用到...
题目描述: LeetCode 378. Kth Smallest Element in a Sorted Matrix Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted or
mid= (small + big) >>1;intlen =0;for(inti=0; i<row; ++i) { len+= upper_bound(matrix[i].begin(), matrix[i].end(), mid) -matrix[i].begin(); }if(len <k) { small= mid +1; }else{ big=mid; } }returnsmall;
Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: ...
https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/ 题目: n x n Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: matrix = [ [ 1, 5, 9], [10, 11, 13], [12, 13, 15] ], k = 8, return 13. ...
Given an n x n matrix where each of the rows and columns are sorted in ascending order, return the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. 题目链接 法1. 直接暴力秒了,时间居然还不错。。 class Solu...