C++ 代码

#include<iostream>
#include<algorithm>
using namespace std;

const int N = 1010;
int n;
int a[N],f[N];

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

    for(int i = 1;i <= n;i ++)
    {
        f[i] = 1;
        for(int j = 1;j < i;j ++)
           if(a[j] < a[i]) 
             f[i] = max(f[i],f[j] + 1);
    }
    int res = 0;
    for(int i = 1;i <= n;i ++) res = max(res,f[i]);
    printf("%d",res);
    return 0;
}