题目链接:http://poj.org/problem?id=1631 就是求一个LIS,但是范围太大(n≤40000),无法用常规O(n²)的朴素DP算法,这时需要优化. 新加一个数组s[]来维护长度当LIS的长度为len时候需要的数组a中的最小数字的值,可以证明这个数组是严格单调递增的,因此可以二分确定每次枚举到a[i]的时候,a[i]在这个数组中所处的位置(下标),也就是a[i]数字时此时之前算过的LIS的长度.之后更新s数组和ans即可.对于最长下降自序列此方法同样适用,但是需要注意那时…

题目大意:不知,根据样例猜测为最长上升子序列(竟然还对了) 题解:$O(n log_2 n)$,求二维偏序,(q为存答案的序列,a存原序列,len为答案) for(int i = 1; i <= n; i++) { if(a[i] > q[len]) {q[++len]=a[i];continue;} *upper_bound(q, q + len, a[i]) = a[i]; } 卡点:无 C++ Code: #include <cstdio> #include <cstr…

Bridging signals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9441   Accepted: 5166 Description 'Oh no, they've done it again', cries the chief designer at the Waferland chip factory. Once more the routing designers have screwed up co…

Bridging signals Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 667    Accepted Submission(s): 443 Problem Description 'Oh no, they've done it again', cries the chief designer at the Waferland…

Bridging signals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9234   Accepted: 5037 Description 'Oh no, they've done it again', cries the chief designer at the Waferland chip factory. Once more the routing designers have screwed up co…

1.链接地址: http://poj.org/problem?id=1631 http://bailian.openjudge.cn/practice/1631 2.题目: Bridging signals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9882   Accepted: 5409 Description 'Oh no, they've done it again', cries the chief des…

Bridging signals Description 'Oh no, they've done it again', cries the chief designer at the Waferland chip factory. Once more the routing designers have screwed up completely, making the signals on the chip connecting the ports of two functional blo…

Bridging signals Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 961    Accepted Submission(s): 627 Problem Description 'Oh no, they've done it again', cries the chief designer at the Waferland…

欢迎参加——每周六晚的BestCoder(有米!) Bridging signals Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 941    Accepted Submission(s): 614 Problem Description 'Oh no, they've done it again', cries the chief…

Language: Default Bridging signals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 10762   Accepted: 5899 Description 'Oh no, they've done it again', cries the chief designer at the Waferland chip factory. Once more the routing designers…