hdu 4302 Holedox Eating

#include<stdio.h>
#include<string.h>
#include<iostream>
#include<algorithm>
#include<queue>
using namespace std;

typedef __int64 ll;
#define N 100005

priority_queue <int, vector<int>, greater<int> > q2;	//left
priority_queue <int, vector<int>, less<int> > q1;	//right

//int a[N*2];

int main()
{
	int tot;
	int t = 1;
	for ( scanf("%d", &tot); tot--; )
	{
		int l, n;
		scanf("%d%d", &l, &n);
		while( !q1.empty() )
			q1.pop();
		while( !q2.empty() )
			q2.pop();
		int now = 0, x, c;
		int cnt = 0;
		ll ans = 0;
		int dir = 1;	//1 -> right
		while(n--)
		{
			scanf("%d", &c);
			if ( c == 0 )
			{
				scanf("%d", &x);
				if( x > now )
					q2.push(x);
				else
					q1.push(x);
			}
			else
			{
				if( !q1.empty() && !q2.empty() )
				{
					int x = q1.top();
					int y = q2.top();
				 	if ( abs(x - now) > abs(y - now) )
				 	{
	 					if( !dir )
	 						dir = 1;
 						ans += abs(now - y);
						now = y;
						q2.pop();
	 				}
	 				else if( abs(x - now) < abs(y - now) )
	 				{
				 		if( dir )
				 			dir = 0;
			 			ans += abs(x - now);
			 			now = x;
			 			q1.pop();
				 	}
				 	else
				 	{
				 		ans += abs(x - now);
	 					if( dir )
	 						now = y, q2.pop();
 						else
 							now = x, q1.pop();
	 				}
				}
				else
				{
					if( q1.empty() && q2.empty() )
						continue;
					if( !q1.empty() )
					{
						int x = q1.top();
						q1.pop();
						if( dir )
							dir = 1;
						ans += abs(now - x);
						now = x;
					}
					if( !q2.empty() )
					{
						int y = q2.top();
						q2.pop();
						if( !dir )
							dir = 1;
						ans += abs(now - y);
						now = y;
					}
				}
			}
			//printf("ans: %I64d\n", ans);
		}
		printf("Case %d: ", t++);
		printf("%I64d\n", ans);
	}
	return 0;
}