oj.uz

답안 #807222

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
807222 2023-08-04T15:01:56 Z hoangnghiep 공장들 (JOI14_factories) C++14
15 / 100
 734 ms 23040 KB 
#include<bits/stdc++.h>
#include "factories.h"
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ll long long
#define f first
#define s second
#define pii pair<ll,ll>
#define piii pair<ll,pair<ll,ll>>
#define vii vector<vector<ll>>
#define vi vector<ll>
#define cd complex<double>
#define endl '\n'
//#define multipletest
using namespace std;
const ll LIM=5e3;
const ll INF=1e18;
const string name="template";
ll n,m;
vector<pii> adj[LIM+5],adj_vt[LIM+5];
ll time_dfs=0;
pii euler_tour[100005],sparse_table[20][100005];
ll dist_X[LIM+5],dist_Y[LIM+5];
ll tin[LIM+5],tout[LIM+5],h[LIM+5],up_weight[20][LIM+5],low[20][LIM+5];
int A[LIM+5],B[LIM+5],D[LIM+5],X[LIM+5],Y[LIM+5];
vector<ll> List;
int color[LIM+5];
 
void dfs(ll u,ll parent,ll depth){
 
	h[u] = depth;
	
	tin[u] = time_dfs;
	
	euler_tour[time_dfs++] = {depth,u};
	
	low[0][u] = parent;
	 
	for(auto v:adj[u]){
		if(v.f==parent) continue;
		dfs(v.f,u,depth + 1);
		
		euler_tour[time_dfs++] = {depth,u};
		
		up_weight[0][v.f] = v.s;	
	}
	tout[u] = time_dfs;
}
 
ll lca(ll u,ll v){
	if(tin[u]>tin[v]){
		swap(u,v);
	}
	ll bt = 63 - __builtin_clzll(tin[v]-tin[u]+1);
	pii mn = min(sparse_table[bt][tin[u]],sparse_table[bt][tin[v] - (1<<bt) + 1]);
	return mn.s;
}
 
ll lift_weight(ll u,ll k){
	ll tmp=0;
	ll w = 0;
	while(k>0){
		if(k%2==1){
			w+=up_weight[tmp][u];
			u=low[tmp][u];
		}
		k>>=1;
		tmp++;
	}
	return w;
}
 
bool cmp(ll a,ll b){
	return tin[a]<tin[b];
}
 
bool isSubtree(ll u,ll v)
{
	return tin[u]<=tin[v] && tin[v]<=tout[u];
}
void dfs_to_find_sol(int u,int parent){
	for(auto v:adj_vt[u]){
		if(v.f==parent) continue;
		dfs_to_find_sol(v.f,u);
		dist_X[u] = min(dist_X[u],dist_X[v.f] + v.s);
		dist_Y[u] = min(dist_Y[u],dist_Y[v.f] + v.s);
	}
}
void Init(int N, int A[], int B[], int D[]){
	n=N;
	for(ll i=0;i<n-1;++i){
		A[i]++;
		B[i]++;
	}
	for(ll i=0;i<n-1;++i){
		adj[A[i]].push_back({B[i],D[i]});
		adj[B[i]].push_back({A[i],D[i]});
	}
	for(ll i=1;i<=n;++i){
		dist_X[i]=INF;
		dist_Y[i]=INF;
		color[i] = -1;
	}
	
	dfs(1,0,0);
	
	for(ll i=0;i<time_dfs;++i){
		sparse_table[0][i]  = euler_tour[i];
	}
	
 	for(ll i=1;i<20;++i){
		for(ll j=0;j+(1<<i)-1<time_dfs;++j){
			sparse_table[i][j] = min(sparse_table[i-1][j],sparse_table[i-1][j + (1<<(i-1))]);
		}
	}
	
	for(ll i=1;i<20;++i){
		for(ll j=1;j<=n;++j){
			low[i][j] =low[i-1][low[i-1][j]];
			up_weight[i][j] = up_weight[i-1][j] + up_weight[i-1][low[i-1][j]];
		}
	}
}
 
long long Query(int S, int X[], int T, int Y[]){
	for(auto x:List){
		color[x] = -1;
		adj_vt[x].clear();
		dist_X[x]=dist_Y[x]=INF;
	}
	List.clear();
    for(ll i=0;i<S;++i){
    	List.push_back(++X[i]);
    	color[X[i]] = 0;
    	dist_X[X[i]]=0;
    	dist_Y[X[i]]=INF;
	}
	bool chk = 0;
	for(ll i=0;i<T;++i){
		List.push_back(++Y[i]);
		if(color[Y[i]]==0){
			return 0;
		}
		color[Y[i]]=1;
		dist_X[Y[i]]=INF;
		dist_Y[Y[i]]=0;
	}
		
	sort(List.begin(),List.end(),cmp);
	for(ll i=1;i<S+T;++i){
		int LCA = lca(List[i-1],List[i]);
		if(color[LCA]==-1){
			dist_X[LCA] = dist_Y[LCA]  =  INF;
		}
		List.push_back(LCA);
	}
	
	int root;
	sort(List.begin(),List.end(),cmp);
	List.erase(unique(List.begin(),List.end()),List.end());
	vector<ll> st;
	for(ll i=0;i<List.size();++i){
		ll u = List[i];
		while(st.size()>=2 && !isSubtree(st.back(),u)){
			ll x = st[st.size()-2];
			ll y= st.back();
			ll LCA = lca(x,y);
			ll w=lift_weight(x,h[x] - h[LCA]) + lift_weight(y,h[y] - h[LCA]);
			adj_vt[x].push_back({y,w});
			adj_vt[y].push_back({x,w});
//			cout<<x<<" "<<y<<" "<<w<<endl;
			root=x;
			st.pop_back();
		}
		st.push_back(u);
	}
	while(st.size()>=2){
			ll x = st[st.size()-2];
			ll y= st.back();
			ll LCA = lca(x,y);
			ll w=lift_weight(x,h[x] - h[LCA]) + lift_weight(y,h[y] - h[LCA]);
			adj_vt[x].push_back({y,w});
			adj_vt[y].push_back({x,w});
//			cout<<x<<" "<<y<<" "<<w<<endl;
			root=x;
			st.pop_back();
	}
	dfs_to_find_sol(root,0);
	ll ans=INF;
    for(auto x:List){
    	ans = min(ans,dist_X[x] + dist_Y[x]);
	}
   	return ans;
}

Compilation message

factories.cpp: In function 'long long int Query(int, int*, int, int*)':
factories.cpp:162:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  162 |  for(ll i=0;i<List.size();++i){
      |             ~^~~~~~~~~~~~
factories.cpp:138:7: warning: unused variable 'chk' [-Wunused-variable]
  138 |  bool chk = 0;
      |       ^~~
factories.cpp:188:17: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
  188 |  dfs_to_find_sol(root,0);
      |  ~~~~~~~~~~~~~~~^~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 1364 KB Output is correct
2 Correct 727 ms 13080 KB Output is correct
3 Correct 734 ms 13120 KB Output is correct
4 Correct 734 ms 13140 KB Output is correct
5 Correct 682 ms 13424 KB Output is correct
6 Correct 425 ms 12988 KB Output is correct
7 Correct 715 ms 13272 KB Output is correct
8 Correct 720 ms 13132 KB Output is correct
9 Correct 683 ms 13420 KB Output is correct
10 Correct 448 ms 12988 KB Output is correct
11 Correct 730 ms 13060 KB Output is correct

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1236 KB Output is correct
2 Runtime error 219 ms 23040 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #3
0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 1364 KB Output is correct
2 Correct 727 ms 13080 KB Output is correct
3 Correct 734 ms 13120 KB Output is correct
4 Correct 734 ms 13140 KB Output is correct
5 Correct 682 ms 13424 KB Output is correct
6 Correct 425 ms 12988 KB Output is correct
7 Correct 715 ms 13272 KB Output is correct
8 Correct 720 ms 13132 KB Output is correct
9 Correct 683 ms 13420 KB Output is correct
10 Correct 448 ms 12988 KB Output is correct
11 Correct 730 ms 13060 KB Output is correct
12 Correct 2 ms 1236 KB Output is correct
13 Runtime error 219 ms 23040 KB Execution killed with signal 11
14 Halted 0 ms 0 KB -