记录详情

#include<bits/stdc++.h>
using namespace std;
stack<long long>s1,s2,s3,s4,s5,s6;
int main()
{
	int n,p;
	cin>>n>>p;
	long long ans=0;
	s1.push(0);s2.push(0);s3.push(0);s4.push(0);s5.push(0);s6.push(0);
	for(int i=1;i<=n;i++)
	{
		int a,b;
		cin>>a>>b;
		if(a==1)
		{
			while(s1.top()>b)
			{
				s1.pop();
				ans++;
			}
			if(s1.top()<b)
			{
				s1.push(b);
				ans++;
			}
			continue;	
		} 
		else if(a==2)
		{
			while(s2.top()>b)
			{
				s1.pop();
				ans++;
			}
			if(s2.top()<b)
			{
				s2.push(b);
				ans++;
			}
			continue;	
		} 
		else if(a==3)
		{
			while(s3.top()>b)
			{
				s3.pop();
				ans++;
			}
			if(s3.top()<b)
			{
				s3.push(b);
				ans++;
			}
			continue;	
		} 
		else if(a==4)
		{
			while(s4.top()>b)
			{
				s4.pop();
				ans++;
			}
			if(s4.top()<b)
			{
				s4.push(b);
				ans++;
			}
			continue;	
		} 
		else if(a==5)
		{
			while(s5.top()>b)
			{
				s5.pop();
				ans++;
			}
			if(s5.top()<b)
			{
				s5.push(b);
				ans++;
			}
			continue;	
		} 
		else if(a==6)
		{
			while(s6.top()>b)
			{
				s6.pop();
				ans++;
			}
			if(s6.top()<b)
			{
				s6.push(b);
				ans++;
			}	
		} 
	}
	cout<<ans;
	return 0;
}