解法:动态规划
#include <iostream>
#include<bits/stdc++.h>
using namespace std;
#define MAX 10001
int main()
{
int a[MAX];
int n;
cin >> n;
int dp[n+1];
dp[0] = 1;
for(int i = 0;i < n;i++){
cin >> a[i];
}
for(int i = 0;i < n;i++){
int ans = 1;
for(int j = i;j >= 0;j--){
if(a[i] > a[j]){
ans = max(ans,dp[j]+1);
}
}
dp[i] = ans;
}
int res = 0;
for(int i = 0;i < n;i++){
res = max(dp[i],res);
}
cout << res << endl;
return 0;
}