POJ 1631

#include <iostream>
#define MAXN 500005
using namespace std;

int T[MAXN];

int binary_search(int *  a, int size, int num) ;

int main()
{
    //freopen("acm.acm","r",stdin);
    int i;
    int index;
    int test;
    int num;
    int place;
    int x;
    cin>>test;

    while(test --)
    {
        index = 1;
        cin>>num;
        cin>>x;
        T[0] = x;
        for(i = 1; i < num; ++ i)
        {
            cin>>x;
            if(x <=    T[0])
            {
                T[0] = x;
            }
            else if(x > T[index-1])
            {
                T[index ++] = x;
            }
            else
            {
                place = binary_search(T,index,x);
                T[place] = x;
            }
        }
        cout<<index<<endl;
    }
}


int binary_search(int *  a, int size, int num) 
{
    int l = 0;
    int r = size-1;

    while(l <= r) 
    {
        int mid = (l + r) / 2;
        if(num > a[mid-1] && num <= a[mid] )
            return mid;            
        else if(num < a[mid])
            r = mid-1;
        else 
            l = mid+1;
    }
}

 

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