[Leetcode]646.Maximum Length of Pair Chain 链接:LeetCode646给出n 个数对。 在每一个数对中,第一个数字总是比第二个数字小。现在,我们定义一种跟随关系,当且仅当 b < c 时,数对(c, d) 才可以跟在 (a, b) 后面。我们用这种形式来构造一个数对链。
classSolution {public:intfindLongestChain(vector<vector<int>>&pairs) { stack<vector<int>>st; sort(pairs.begin(), pairs.end(), [](vector<int>& a, vector<int>&b) {returna[1] < b[1]; });for(auto pair : pairs) {if(st.empty()) st.push(pair);else{ auto t=st.top();if(pai...
646. Maximum Length of Pair Chain You are given n pairs of numbers. In every pair, the first number is always smaller than the second number. Now, we define a pair (c, d) can follow another pair (a, b) if and only if b < c. Chain o......
原题链接在这里:https://leetcode.com/problems/maximum-length-of-pair-chain/description/ 题目: You are givennpairs of numbers. In every pair, the first number is always smaller than the second number. Now, we define a pair(c, d)can follow another pair(a, b)if and only ifb < c. Ch...
646. Maximum Length of Pair Chain You are given n pairs of numbers. In every pair, the first number is always smaller than the second number. Now, we define a pair (c, d) can follow another pair (a, b) if and only if b < c. Chain of pairs can be formed in this fashion....
1. Description Maximum Length of Pair Chain 2. Solution 解析:Version 1,采用贪心算法,即每次都添加符合条件的、右端值最小的数值对,首先对数值对按右端值进行排序,然后将右端值最小的数值对添加到数组中,然后寻找下一个满足左端值大于数组中最后一个右端值的数值对,最后数组的长度即为最长的数值对链。每次...
https://leetcode.com/problems/maximum-length-of-pair-chain/description/ 解题思路: 先对数组排序(根据第一个数字),set pre = Integer.MIN_VALUE; 2.if(pairs[i][0] > pre) len++; pre = pairs[i][1]; else if(pre > pairs[i][1]){ ...
LeetCode 646. Maximum Length of Pair Chain [Medium] 原题地址 题目内容 题目分析 题目的意思为找出能相连的最长串的长度,(a,b),(c,d),因为b < c,所以他们是能相连的。采用动态规划的方法,首先对原来的pair数组进行排序。用dp[n]记录每个pair能形成链的最大长度。设一个变量temp,如果【pairs[j][1]...
Explanation: The longest chain is [1,2] -> [3,4] Note: The number of given pairs will be in the range [1, 1000]. 方法一: stack 思路:把array根据first number和second number从小到大排序 1 维护一个递增栈,栈里存放着的是每一个pair。
首先按每个pair的第二个元素从小到大,如果第二个元素相等就按第一个元素从小到大排序,然后dp[i]是第1对pair到第i对pair时最长的子序列pair的递增长度。(O(n^2)) boolcmp(vector<int> v1,vector<int> v2){returnv1[1]!=v2[1]?v1[1]<v2[1]:v1[0]<v2[0]; ...