Submission #13390

#	Time	Username	Problem	Language	Result	Execution time	Memory
13390		ggoh	코알라 (JOI13_koala)	C++98	100 / 100	155 ms	77680 KiB

koala

#include<cstdio>
#include<vector>
using namespace std;
struct Node{
	int s,e;long long v;int left,right;
};
vector<Node>Tree;
long long INF=-1e18,x,y,A,X[100005],E[100005];
int T[100005],i,B[100005],m,Y[100005],k,D,N;
void update(int num,int pos,long long val)
{
	Node t=Tree[num];
	if(t.v<val)
	{
		Tree[num].v=val;
	}
	long long h=(t.s+t.e-1)/2;
	if(t.s==t.e-1)
	{
		return ;
	}
	if(h+1>pos)
	{
		if(t.left==-1)
		{
			Tree.push_back({t.s,h+1,INF,-1,-1});
			Tree[num].left=Tree.size()-1;
		}
		update(Tree[num].left,pos,val);
	}
	else
	{
		if(t.right==-1)
		{
			Tree.push_back({h+1,t.e,INF,-1,-1});
			Tree[num].right=Tree.size()-1;
		}
		update(Tree[num].right,pos,val);
	}
}
long long rmq(int num,int p,int q)
{
	Node t=Tree[num];
	if(t.e<p||q<t.s)return INF;
	if(t.s>=p&&t.e<=q)return t.v;
	long long res=INF;
	if(t.left>=0)res=max(res,rmq(t.left,p,q));
	if(t.right>=0)res=max(res,rmq(t.right,p,q));
	return res;
}
main()
{
	scanf("%d%d%d%lld%d",&k,&m,&D,&A,&N);
	for(i=1;i<=N;i++)
	{
		scanf("%d%d",&T[i],&B[i]);
		T[i]-=k;
		X[i]=T[i]/D;
		Y[i]=T[i]%D;
	}
	T[N+1]=m-k;
	X[N+1]=T[N+1]/D;
	Y[N+1]=T[N+1]%D;
	B[0]=B[N+1]=0;
	Tree.push_back({0,D,INF,-1,-1});
	E[0]=0;
	update(0,Y[0],X[0]*A);
	for(i=1;i<=N+1;i++)
	{
		x=rmq(0,0,Y[i]);
		y=rmq(0,Y[i],D);
		E[i]=max(x-A,y)-X[i]*A+B[i];
		update(0,Y[i],E[i]+X[i]*A);
	}
	printf("%lld",E[N+1]);
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50