POJ 2533 Longest Ordered Subsequence

解题思路:最长递增子序列

#include <iostream>
using namespace std;
int main()
{
    int i,j,k,n,p,q,m,len,num[1000],B[1001];
    scanf("%d", &n);
    for(i=0;i<n;i++)scanf("%d", &num[i]);
    for(B[0]=-1,B[1]=num[0],len=1,i=1;i<n;i++)
    {
        for(p=0,q=len,m=(p+q)/2;p<=q;m=(p+q)/2)
            if(B[m]<num[i])p=m+1;else q=m-1;
        B[p]=num[i];if(p>len)len++;
    }
    printf("%d\n",len);
    return 0;
}