LIS (nlogn解法）

最长递增子序列nlogn解法：

 

int a[maxn+5];

int find(int s, int t, int v)//binary_search
{
    int mid;
    while(s<=t)
    {
        mid = (s+t)>>1;
        if (v>a[mid])
            s = mid + 1;
        else
            t = mid - 1;
    }
    return s;
}

int main()
{
    int n;
    int i, len;
    while(scanf("%d", &n)!=EOF)
    {
        for (i=0; ia[len-1])
            {
                a[len] = a[i];
                len++;
            }
            else
            {
                a[find(0, len-1, a[i])] = a[i];
            }
        }
        printf("%d\n", len);
    }
    return 0;
}