Bridging signals hdu 1950 (最长上升子序列)

http://acm.split.hdu.edu.cn/showproblem.php?pid=1950

题意:求最长上升(不连续or连续)子序列

推荐博客链接:

http://blog.csdn.net/sinat_30062549/article/details/47197073

#include <iostream>
#include <stdio.h>
#include <string.h>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <queue>
#include <stack>
#include <math.h>

using namespace std;

#define INF 0x3f3f3f3f
const int maxn = 510000;
typedef long long LL;
int a[maxn], s[maxn];

int main()
{
    int T, n;

    scanf("%d", &T);

    while(T --)
    {
        scanf("%d", &n);

        for(int i=1; i<=n; i++)
            scanf("%d", &a[i]);

        int len = 0;
        memset(s, 0, sizeof(s));

        for(int i=1; i<=n; i++)
        {
            if(a[i]>=s[len])
            {
                s[++len]=a[i];
                continue;
            }

            int pos = upper_bound(s, s+len, a[i])-s;///找出s数组中比a[i]大的数字的下标
            s[pos] = a[i];
        }

        printf("%d
", len);
    }
    return 0;
}
View Code
原文地址:https://www.cnblogs.com/daydayupacm/p/5790184.html