求助大神

#include<bits/stdc++.h>

using namespace std;

int a[500010],b[500010],c[500010],n=0,i,j,ans=1,t=0;

int main()
{
	//freopen("asd.txt","r",stdin);
	while(scanf("%d",&a[n])!=EOF) n++;
	n--;
	for(i=1; i<=n; i++)
	{
		b[i]=1;
		for(j=t; j>0; j--)
		{
			if(a[i]<=a[c[j]])
			{
				b[i]=b[c[j]]+1;
				break;
			}
		}
		t=max(t,b[i]);
		c[b[i]]=i;
		ans=max(ans,b[i]);
	}
	printf("%d\n",ans);
	ans=1;t=0;
	for(i=1; i<=n; i++)
	{
		b[i]=1;
		for(j=t; j>0; j--)
		{
			if(a[i]>a[c[j]])
			{
				b[i]=b[c[j]]+1;
				break;
			}
		}
		t=max(t,b[i]);
		c[b[i]]=i;
		ans=max(ans,b[i]);
	}
	printf("%d\n",ans);
	return 0;
}

188分