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답안 #1040560

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1040560 2024-08-01T07:25:15 Z 정희우(#10998) The Ties That Guide Us (CEOI23_incursion) C++17
0 / 100
 174 ms 14176 KB 
#include <vector>
#include "incursion.h"
#include <cstdio>
#include<iostream>
#include<algorithm>

using namespace std;
using lint = long long;
using intp = pair<int,int>;
using vint = vector<int>;
using vintp = vector<intp>;

const int MAX_N=45010;

int n;
vintp eg[MAX_N];
int sz[MAX_N];
vint val;
int isleaf=0;

bool compe(const intp &e1,const intp &e2)
{
	return e1.second>e2.second;
}

int fillsz(int v,int p)
{
	sz[v]=1;
	for(auto &e : eg[v])
		if(e.first!=p)
		{
			e.second=fillsz(e.first,v);
			sz[v]+=e.second;
		}
	for(auto &e : eg[v])
		if(e.first==p)
			e.second=n-sz[v];
	sort(eg[v].begin(),eg[v].end(),compe);
	return sz[v];
}

bool ismid(int v)
{
	int mx=0;
	for(auto e : eg[v])
		mx=max(mx,e.second);
	int c=0;
	for(auto e : eg[v])
		if(e.second==mx)c++;
	return c>=2;
}

void dfs(int v,int p)
{
	if(ismid(v))
	{
		val[v-1]=isleaf;
	}
	else if(p==0)
	{
		val[v-1]=0;
	}
	else
	{
		int mx=0;
		for(auto e : eg[v])
			mx=max(mx,e.second);
		for(auto e : eg[v])
			if(e.first==p)
				val[v-1]=(e.second==mx);
	}
	for(auto e : eg[v])
		if(e.first!=p)
			dfs(e.first,v);
}

vint mark(vintp F, int safe)
{
  	n=F.size()+1;
	for(int i=1;i<=n;i++)
		eg[i].clear();
	for(int i=0;i<n-1;i++)
	{
		int u=F[i].first,v=F[i].second;
		eg[u].push_back({v,0});
		eg[v].push_back({u,0});
	}
	val.resize(n);
	fillsz(safe,0);
	isleaf=(eg[safe].size()<=1);
	dfs(safe,0);
	return val;
}

bool checkleaf(int v,int p)
{
	if(isleaf==-1)return false;
	int flag=1;
	for(auto e : eg[v])
		if(e.first!=p && eg[e.first].size()>1)flag=0;
	if(flag==0)return false;
	if(isleaf==0)return true;
	for(auto e : eg[v])
		if(e.first!=p)
		{
			if(visit(e.first)==0)return true;
			visit(v);
		}
	return false;
}

void calc(int v,int p,int t)
{
	if(ismid(v))
	{
		isleaf=t;
		if(checkleaf(v,p))
			return;
		for(auto e : eg[v])
			if(e.first!=p)
			{
				int nt=visit(e.first);
				if(nt==0)
				{
					calc(e.first,v,nt);
					return;
				}
				visit(v);
			}
		return;
	}
	if(checkleaf(v,p))
		return;
	if(t==1)return calc(eg[v][0].first,v,visit(eg[v][0].first));
	if(t==0 && eg[v].size()<=1)return;
	int nt;
	if(eg[v][1].first!=p)
	{
		nt=visit(eg[v][1].first);
		if(nt==0)
		{
			calc(eg[v][1].first,v,nt);
			return;
		}
		visit(v);
	}
	if(eg[v][2].first!=p)
	{
		nt=visit(eg[v][2].first);
		if(nt==0)
		{
			calc(eg[v][2].first,v,nt);
			return;
		}
		visit(v);
	}
}

void locate(vintp F, int curr, int t)
{
	n=F.size()+1;
	for(int i=1;i<=n;i++)
		eg[i].clear();
	for(int i=0;i<n-1;i++)
	{
		int u=F[i].first,v=F[i].second;
		eg[u].push_back({v,0});
		eg[v].push_back({u,0});
	}
	fillsz(curr,0);
	isleaf=-1;
	calc(curr,0,t);
	return;
}

Compilation message

interface.cpp: In function 'int main()':
interface.cpp:44:55: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |     if(fread(T.data(), sizeof(int), 2 * N - 2, stdin) != 2 * N - 2) exit(0);
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
interface.cpp:50:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |         int l = (numbers.size() == N ? N : 0);
      |                  ~~~~~~~~~~~~~~~^~~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2816 KB Correct

Subtask #1
0.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 174 ms 13032 KB Correct
2 Correct 167 ms 13280 KB Correct
3 Incorrect 95 ms 14176 KB Not correct
4 Halted 0 ms 0 KB -

Subtask #2
0.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 8728 KB Correct
2 Correct 64 ms 8832 KB Correct
3 Correct 74 ms 8848 KB Correct
4 Correct 77 ms 11360 KB Correct
5 Correct 120 ms 11392 KB Correct
6 Correct 133 ms 11632 KB Correct
7 Correct 68 ms 8536 KB Correct
8 Correct 67 ms 8700 KB Correct
9 Correct 73 ms 8532 KB Correct
10 Correct 65 ms 8608 KB Correct
11 Correct 75 ms 8476 KB Correct
12 Correct 65 ms 8608 KB Correct
13 Correct 72 ms 8544 KB Correct
14 Correct 51 ms 7212 KB Correct
15 Correct 51 ms 7204 KB Correct
16 Correct 63 ms 8576 KB Correct
17 Correct 65 ms 8664 KB Correct
18 Correct 66 ms 8572 KB Correct
19 Correct 68 ms 8540 KB Correct
20 Correct 47 ms 7216 KB Correct
21 Correct 51 ms 7220 KB Correct
22 Correct 49 ms 7332 KB Correct
23 Correct 48 ms 7208 KB Correct
24 Correct 53 ms 7216 KB Correct
25 Correct 47 ms 6948 KB Correct
26 Correct 75 ms 8820 KB Correct
27 Correct 73 ms 8480 KB Correct
28 Correct 70 ms 8576 KB Correct
29 Correct 72 ms 8584 KB Correct
30 Correct 81 ms 8972 KB Correct
31 Correct 64 ms 8584 KB Correct
32 Correct 69 ms 8616 KB Correct
33 Correct 68 ms 8536 KB Correct
34 Correct 65 ms 8612 KB Correct
35 Correct 60 ms 8816 KB Correct
36 Correct 67 ms 8844 KB Correct
37 Correct 66 ms 8604 KB Correct
38 Correct 74 ms 8824 KB Correct
39 Correct 61 ms 8588 KB Correct
40 Correct 70 ms 8856 KB Correct
41 Correct 68 ms 8832 KB Correct
42 Correct 75 ms 8572 KB Correct
43 Correct 70 ms 8832 KB Correct
44 Correct 74 ms 8956 KB Correct
45 Correct 66 ms 8632 KB Correct
46 Correct 66 ms 8736 KB Correct
47 Correct 75 ms 8852 KB Correct
48 Correct 74 ms 8752 KB Correct
49 Correct 74 ms 8536 KB Correct
50 Correct 72 ms 8864 KB Correct
51 Correct 69 ms 8580 KB Correct
52 Correct 69 ms 8884 KB Correct
53 Correct 71 ms 8900 KB Correct
54 Correct 65 ms 8844 KB Correct
55 Correct 66 ms 8600 KB Correct
56 Correct 74 ms 8824 KB Correct
57 Correct 71 ms 8580 KB Correct
58 Correct 70 ms 8832 KB Correct
59 Incorrect 56 ms 8820 KB Not correct
60 Halted 0 ms 0 KB -

Subtask #3
0.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2816 KB Correct
2 Correct 174 ms 13032 KB Correct
3 Correct 167 ms 13280 KB Correct
4 Incorrect 95 ms 14176 KB Not correct
5 Halted 0 ms 0 KB -