hdu 1087 Super Jumping! Jumping! Jumping!(LIS)
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hdu 1087 Super Jumping! Jumping! Jumping!(LIS) 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1087
LIS
题目大意:背景是一种特殊的跳棋,棋盘就是棋子就是一个数列,严格增序的元素之间可跳,求一个子列,使其和最大。
题目分析:这似乎不能叫做LIS(最长递增子序列)了,而应该叫GIS(地理信息系统!?别闹了,是最大递增子序列),跟LIS差不多做法,其中有些小细节不一样(其实是更简单了)。
code:
#include<stdio.h>int main(){int i,j,n,a[1010],b[1010],ans;while(scanf("%d",&n),n){scanf("%d",&a[0]);ans=b[0]=a[0];for(i=1;i<n;i++){scanf("%d",&a[i]);b[i]=a[i];for(j=0;j<i;j++){if(a[j]<a[i]&&a[i]+b[j]>b[i])b[i]=a[i]+b[j];}ans=ans>b[i]?ans:b[i];}printf("%d\n",ans);}}PS:就当是复习了LIS吧,最近刚重新开工,效率奇低,需要热热手……
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