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MY TLE的DP#include <iostream>
using namespace std;
int N;
int num[30001];
int dp[30001][2];
int main()
{
int T;
scanf("%d" , &T);
while(T --)
{
int i , j;
scanf("%d" , &N);
for(i = 1 ; i <= N ; i ++)
scanf("%d" , &num[i]);
dp[1][0] = dp[1][1] = num[1];
int l1 = 1 , l2 = 1;
for(i = 2 ; i <= N ; i ++)
{
if(dp[1][1] < num[i])
dp[1][1] = num[i];
for(j = 2 ; j < l2 ; j ++)
{
if(dp[j][0] < num[i] && num[i] > dp[j+1][1])
dp[j+1][1] = num[i];
}
for(j = 1 ; j < l1 ; j ++)
{
if(dp[j][1] > num[i] && num[i] < dp[j+1][0])
dp[j+1][0] = num[i];
}
if(dp[l1][0] < num[i] && l1 != 1)
{
if(l2 <= l1)
{
l2 = l1 + 1;
dp[l2][1] = num[i];
}
else if(l1 == l2 + 1 && num[i] > dp[l2][1])
{
dp[l2][1] = num[i];
}
}
if(dp[l2][1] > num[i])
{
if(l1 <= l2)
{
l1 = l2 + 1;
dp[l1][0] = num[i];
}
else if(l1 == l2 - 1 && num[i] < dp[l1][0])
dp[l1][0] = num[i];
}
}
if(l1 < l2)
l1 = l2;
printf("%d\n" , l1);
}
return 0;
}
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