给你每个物体两个参数,求最长的链要求第一个参数递增,第二个参数递减,要求输出任意最长路径. 首先第一反应根据第二个参数排个序,然后不就是最长上升子序列的问题吗? O(nlogn)的复杂度,当然这样可以写,写法也不难. 然后发现这个还是个DAG,也可以用拓扑排序来搞定,输出最长路径,复杂度O(n*n),更新的时候需要更新并记录每个点的前节点,最后倒序输出. 第二种就当练练手吧 先上第二种代码: #include<cstdio> #include<algorithm> #include…

J. FatMouse's Speed FatMouse believes that the fatter a mouse is, the faster it runs. To disprove this, you want to take the data on a collection of mice and put as large a subset of this data as possible into a sequence so that the weights are incre…

FatMouse's Speed Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 14980    Accepted Submission(s): 6618 Special Judge Problem Description FatMouse believes that the fatter a mouse is, the faster…

FatMouse's Speed Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1160 Description FatMouse believes that the fatter a mouse is, the faster it runs. To disprove this, you want to take the data on…

FatMouse's Speed Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13133    Accepted Submission(s): 5778Special Judge Problem Description FatMouse believes that the fatter a mouse is, the faster i…

FatMouse's Speed Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13643    Accepted Submission(s): 6011Special Judge Problem Description FatMouse believes that the fatter a mouse is, the faster i…

FatMouse's Speed Time Limit: 2 Seconds      Memory Limit:65536 KB     Special Judge FatMouse believes that the fatter a mouse is, the faster it runs. To disprove this, you want to take the data on a collection of mice and put as large a subset of thi…

p的思路不一定要到最后去找到ans:也可以设置成在中间找到ans:比如J - FatMouse's Speed 这个题,如果要是让dp[n]成为最终答案的话,即到了i,最差的情况也是dp[i-1],就很难去保存路径,但是如果换一个思路,让dp[i]必须去参与,如果无法与前面的结合,那么就新开一个. 最后路径是保存的逆序的,那么开一个stack就可以解决. //显然这个题是要维护两个变量的最长上升子序列 #include <iostream> #include <fstream> #…

FatMouse's Speed Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 20803    Accepted Submission(s): 9227Special Judge Problem Description FatMouse believes that the fatter a mouse is, the faster…

http://acm.hdu.edu.cn/showproblem.php?pid=1160 FatMouse's Speed Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 12338    Accepted Submission(s): 5405Special Judge Problem Description FatMouse be…