답안 #1067509

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1067509 2024-08-20T18:53:28 Z jamjanek Sky Walking (IOI19_walk) C++17
0 / 100
77 ms 35784 KB
#include "walk.h"
#include<bits/stdc++.h>
using namespace std;

const int base = 1<<17;
int tree[2*base];
void ustaw(int w, int l, int p, int a, int b, int v){
	if(a<=l && p<=b){
		tree[w] = v;
		return;
	}
	if(b<l || p<a)return;
	if(tree[w]!=-1)
		tree[w*2] = tree[w*2+1] = tree[w];
	ustaw(w*2, l, (l+p)/2, a, b, v);
	ustaw(w*2+1, (l+p)/2+1, p, a, b, v);
	tree[w] = -1;
}
int odczyt(int w){
	int res = -1;
	w+=base;
	while(w>0){
		if(tree[w]!=-1)
			res = tree[w];
		w/=2;
	}
	return res;
}

vector<int>l,r,y,x;
void dodaj(int a, int b, int h){
	l.push_back(a);
	r.push_back(b);
	y.push_back(h);
}
vector<pair<int,long long>>graf[700010];
long long dist[700010];
bool odw[700010];
map<pair<int,int>,int>mapa;
long long odl(pair<int,int>a, pair<int,int>b){
	return abs(a.second-b.second);
}
long long odl1(pair<int,int>a, pair<int,int>b){
	return abs(x[a.first]-x[b.first]);
}
map<int,set<int>>poziomy;
long long min_distance(vector<int> X, vector<int> h, vector<int> L, vector<int> R, vector<int> Y, int s, int g) {
	x = X;
	// podzielic kazda pozioma
	// dla kazdej poziomej wyznaczyc pozioma w dol z obu koncy
	vector<tuple<int,int,int,int>>przedzialy;
	int n = x.size();
	int m = L.size();
	int i;
	if(s>g)swap(s,g);
	for(i=0;i<m;i++){
		poziomy[Y[i]].insert(L[i]);
		if(L[i]<s && R[i]>g){
//			printf("%d 3\n", i);
			dodaj(L[i],s,Y[i]);
			dodaj(s,g,Y[i]);
			dodaj(g,R[i],Y[i]);
		}
		else if(L[i]<s && R[i]>s){
//			printf("%d 2\n", i);
			dodaj(L[i],s,Y[i]);
			dodaj(s,R[i],Y[i]);
		}
		else if(g<R[i] && L[i]<g){
//			printf("%d 2\n", i);
			dodaj(L[i],g,Y[i]);
			dodaj(g,R[i],Y[i]);
		}
		else{
//			printf("%d 1\n");
			dodaj(L[i],R[i],Y[i]);
		}
	}
	m = l.size();
	//for(i=0;i<m;i++)printf("%d %d %d %d\n", y[i], l[i], r[i], i);printf("\n");
	for(i=0;i<m;i++)
		przedzialy.push_back({y[i],l[i],r[i],0});
	sort(przedzialy.begin(), przedzialy.end());
	for(i=0;i<m;i++)
		get<3>(przedzialy[i]) = i;
	for(i=0;i<n;i++)tree[i+base] = -1;
	for(i=base-1;i>0;i--)
		tree[i] = -1;
	ustaw(1, 0,base-1,s,s,0);
	ustaw(1, 0,base-1,g,g,0);
	mapa[{s,0}]=0;
	mapa[{g,0}]=1;
	for(auto j: przedzialy){
		auto [Y,L,R,i] = j;
		int a = odczyt(L);
		if(a!=-1 && mapa.find({L, a})==mapa.end())
			mapa[{L,a}] = mapa.size();
		a = odczyt(R);
		if(a!=-1 &&mapa.find({R, a})==mapa.end())
			mapa[{R,a}] = mapa.size();
		if(mapa.find({R, Y})==mapa.end())
			mapa[{R,Y}] = mapa.size();
		if(mapa.find({L, Y})==mapa.end())
			mapa[{L,Y}] = mapa.size();
		ustaw(1, 0, base-1, L, R, Y);

/*
		for(int ij=0;ij<2;ij++){
			int a = odczyt(ij?R:L);
			int s = (a-2)/2;
			b = i*2+2+ij;
//			if(ij==0)printf("LEWY: %d %d(%d)\n", b, a,s);
//			else printf("PRAWY: %d %d(%d)\n", b, a,s);
			if(a==-1)continue;
			if(a==0 || a==1){
				graf[b].push_back({a,Y});
				graf[a].push_back({b,Y});
			}
			else{
				long long d;
				d=Y-get<0>(przedzialy[s])+abs(x[ij?R:L]-x[get<1>(przedzialy[s])]);
				graf[b].push_back({a, d});
				graf[a].push_back({b, d});
				d=Y-get<0>(przedzialy[s])+abs(x[ij?R:L]-x[get<2>(przedzialy[s])]);
				graf[b].push_back({a^1, d});
				graf[a^1].push_back({b, d});
				
			}
		}
		
		graf[b].push_back({b-1, abs(x[L]-x[R])});
		graf[b-1].push_back({b, abs(x[L]-x[R])});
		ustaw(1, 0, base-1, L, R, b-1);*/
//		printf("%d %d %d: %d %d\n", y[i], l[i], r[i], b-1, b);
	}/*
	for(i=0;i<(int)przedzialy.size()*2+2;i++){
		printf("%d: ", i);
		for(auto j: graf[i])
			printf("%d-%d ", j.first, j.second);
		printf("\n");
	}*/
	vector<pair<pair<int,int>,int>>wartosci;
	for(auto j=mapa.begin();j!=mapa.end();j++){
		auto xd = *j;
		wartosci.push_back({xd.first, xd.second});
		auto next = j;
		next++;
		if(next==mapa.end())break;
		if((*next).first.first==(*j).first.first){
			graf[(*next).second].push_back({(*j).second, odl((*j).first, (*next).first)});
			graf[(*j).second].push_back({(*next).second, odl((*j).first, (*next).first)});
		}
	}
		
	mapa.clear();
	for(auto j:wartosci)
		mapa[{j.first.second,j.first.first}]=j.second;
	for(auto j=mapa.begin();j!=mapa.end();j++){
		if((*j).first.first==0)continue;
		auto next = j;
		next++;
		if(next==mapa.end())break;
		if((*next).first.first==(*j).first.first){
			int a =(*j).first.second, b = (*next).first.second;
			if(a==b || poziomy[(*next).first.first].upper_bound(a)==poziomy[(*next).first.first].end()||*(poziomy[(*next).first.first].lower_bound(a))<b){
				graf[(*next).second].push_back({(*j).second, x[(*next).first.second]-x[(*j).first.second]});
				graf[(*j).second].push_back({(*next).second, x[(*next).first.second]-x[(*j).first.second]});
			}
		}
	}/*
	for(auto j: wartosci)printf("%d %d %d\n", j.second, j.first.first, j.first.second);
	for(i=0;i<10;i++){
		printf("%d: ", i);
		for(auto j: graf[i])printf("%d-%d ", j.first,j.second);printf("\n");
	}*/
	priority_queue<pair<long long, int>>kolejka;
	dist[0] = 1;
	kolejka.push({-1,0});
	while(kolejka.size()){
		auto a = kolejka.top();
		//printf("%lld %d %d\n", -a.first, a.second);
		kolejka.pop();
		if(odw[a.second])continue;
		odw[a.second]=1;
		for(auto j: graf[a.second]){
			if(dist[j.first]==0 || dist[j.first]>dist[a.second]+j.second){
				dist[j.first]=dist[a.second]+j.second;
				kolejka.push({-dist[j.first], j.first});
			}
		}
	}
	return dist[1]-1;
}
# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 21340 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 21340 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 77 ms 35784 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 77 ms 35784 KB Output isn't correct
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 21340 KB Output isn't correct
2 Halted 0 ms 0 KB -