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답안 #59166

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
59166 2018-07-20T21:55:11 Z TadijaSebez Simurgh (IOI17_simurgh) C++11
100 / 100
 503 ms 30580 KB 
#include "simurgh.h"
#include <stdio.h>
#include <vector>
#include <set>
using namespace std;
#define pb push_back
#define mp make_pair
const int N=505;
const int M=N*N;
//---------------------------//
/*
bool in[M];
int count_common_roads(vector<int> v)
{
	int i,sol=0;
	for(i=0;i<v.size();i++) sol+=in[v[i]];
	return sol;
}
*/
//---------------------------//
vector<int> T,E[N],R[N];
vector<pair<int,int> > edges;
int get(int u, int e)
{
	if(edges[e].first==u) return edges[e].second;
	return edges[e].first;
}
int m;
bool was[N];
void init(){ for(int i=0;i<N;i++) was[i]=0;}
void AddEdge(int u, int v, int e){ E[u].pb(e);E[v].pb(e);edges.pb(mp(u,v));R[u].pb(e);R[v].pb(e);}
void DelEdge(int e)
{
#define E R
	int u=edges[e].first,i,j;
	for(j=0;j<E[u].size();j++) if(E[u][j]==e) break;
	for(i=j;i+1<E[u].size();i++) E[u][i]=E[u][i+1];
	E[u].pop_back();
	u=edges[e].second;
	for(j=0;j<E[u].size();j++) if(E[u][j]==e) break;
	for(i=j;i+1<E[u].size();i++) E[u][i]=E[u][i+1];
	E[u].pop_back();
#undef E
}
int par[N],dep[N],ed[N];
bool mark[M],done[M];
void FindTree(int u)
{
	was[u]=1;dep[u]=dep[par[u]]+1;
	for(int i=0;i<E[u].size();i++)
	{
		int e=E[u][i];
		int v=get(u,e);
		if(!was[v]) ed[v]=e,par[v]=u,mark[e]=1,T.pb(e),FindTree(v);
	}
}
int LCA(int u, int v)
{
	while(dep[u]>dep[v]) u=par[u];
	while(dep[v]>dep[u]) v=par[v];
	while(par[u]!=par[v]) u=par[u],v=par[v];
	return v==u?v:par[v];
}
pair<vector<int> ,vector<int> > Undone(int u, int v)
{
	int lca=LCA(u,v);
	vector<int> sol,cycle;
	for(;u!=lca;u=par[u])
	{
		cycle.pb(ed[u]);
		if(!done[ed[u]]) sol.pb(ed[u]);
	}
	u=v;
	for(;u!=lca;u=par[u])
	{
		cycle.pb(ed[u]);
		if(!done[ed[u]]) sol.pb(ed[u]);
	}
	return mp(sol,cycle);
}
struct DSU
{
	int p[N];
	DSU(){ for(int i=0;i<N;i++) p[i]=i;}
	void init(){ for(int i=0;i<N;i++) p[i]=i;}
	int Find(int x){ return x==p[x]?x:p[x]=Find(p[x]);}
	void Union(int x, int y){ p[Find(x)]=Find(y);}
	void Union(pair<int,int> a){ Union(a.first,a.second);}
	bool Check(pair<int,int> a){ return Find(a.first)!=Find(a.second);}
} DS;
int val[M];
pair<vector<int> ,int> Extend(vector<int> v)
{
	DS.init();
	int i,sol=0;
	for(i=0;i<v.size();i++) DS.Union(edges[v[i]]);
	for(i=0;i<T.size();i++) if(DS.Check(edges[T[i]])) DS.Union(edges[T[i]]),v.pb(T[i]),sol+=val[T[i]];
	return mp(v,sol);
}
int Forest(vector<int> v)
{
	pair<vector<int> ,int> tmp=Extend(v);
	return count_common_roads(tmp.first)-tmp.second;
}
int Cycle(vector<int> v)
{
	pair<vector<int> ,int> tmp=Extend(v);
	return count_common_roads(tmp.first);
}
int min(int a, int b){ return a>b?b:a;}
int max(int a, int b){ return a>b?a:b;}
vector<int> S;
int deg[N];
vector<int> find_roads(int n, vector<int> u, vector<int> v)
{
	int i,j,k;
	m=u.size();
	for(i=0;i<m;i++) AddEdge(u[i]+1,v[i]+1,i);
	FindTree(1);
	int tsz=count_common_roads(T);
	for(i=0;i<m;i++) if(!mark[i])
	{
		pair<vector<int> ,vector<int> > tmp=Undone(edges[i].first,edges[i].second);
		if(tmp.first.size()==0) continue;
		tmp.second.pb(i);
		tmp.first.pb(i);
		vector<int> ask,ans;
		int lo=n,hi=-1;
		for(j=0;j<tmp.first.size();j++)
		{
			ask.clear();
			for(k=0;k<tmp.second.size();k++)
			{
				if(tmp.second[k]!=tmp.first[j]) ask.pb(tmp.second[k]);
			}
			ans.pb(Cycle(ask));
			lo=min(lo,ans.back());
			hi=max(hi,ans.back());
		}
		if(lo==hi)
		{
			int one=-1,zero=-1;
			for(j=0;j<tmp.second.size();j++) if(done[tmp.second[j]])
			{
				if(val[tmp.second[j]]) one=tmp.second[j];
				else zero=tmp.second[j];
			}
			if(zero==-1) lo--;
			else
			{
				if(one!=-1)
				{
					ask.clear();
					for(k=0;k<tmp.second.size();k++)
					{
						if(tmp.second[k]!=one) ask.pb(tmp.second[k]);
					}
					int tree=Cycle(ask);
					lo=min(lo,tree);
					hi=max(hi,tree);
				}
				ask.clear();
				for(k=0;k<tmp.second.size();k++)
				{
					if(tmp.second[k]!=zero) ask.pb(tmp.second[k]);
				}
				int tree=Cycle(ask);
				lo=min(lo,tree);
				hi=max(hi,tree);
			}
		}
		for(j=0;j<tmp.first.size();j++)
		{
			if(ans[j]==hi)
			{
				//printf("OUT: %i\n",tmp.first[j]);
				done[tmp.first[j]]=1;
				DelEdge(tmp.first[j]);
			}
			else
			{
				//printf("IN: %i\n",tmp.first[j]);
				done[tmp.first[j]]=1;
				DelEdge(tmp.first[j]);
				val[tmp.first[j]]=1;
				S.pb(tmp.first[j]);
			}
		}
	}
	for(i=0;i<T.size();i++) if(!done[T[i]])
	{
		//printf("BRIDGE: %i\n",T[i]);
		done[T[i]]=1;
		val[T[i]]=1;
		S.pb(T[i]);
		DelEdge(T[i]);
	}
	for(i=1;i<=n;i++) deg[i]=Forest(R[i]);
	for(k=1;k<=n;k++)
	{
		for(i=1;i<=n;i++)
		{
			if(deg[i]==1)
			{
				//if(x==1)
				//{
					//printf("%i %i:D\n",i-1,R[i].size());
					vector<int> tmp,ask[2];
					tmp=R[i];
					while(tmp.size()>1)
					{
						ask[0].clear();ask[1].clear();
						for(j=0;j<tmp.size();j++) ask[j&1].pb(tmp[j]);
						int x=Forest(ask[0]);
						if(x==1) tmp=ask[0];
						else tmp=ask[1];
					}
					//printf("LEAF: %i\n",tmp[0]);
					S.pb(tmp[0]);
					val[tmp[0]]=1;
					done[tmp[0]]=1;
					DelEdge(tmp[0]);
					deg[i]--;
					deg[get(i,tmp[0])]--;
				//}
			}
		}
	}
	return S;
}
//---------------------------//
/*
int main()
{
	int n,m,i,x;
	vector<int> u,v;
	scanf("%i %i",&n,&m);
	u.resize(m);v.resize(m);
	for(i=0;i<m;i++) scanf("%i %i",&u[i],&v[i]);
	for(i=0;i<n-1;i++) scanf("%i",&x),in[x]=1;
	vector<int> sol=find_roads(n,u,v);
	for(i=0;i<sol.size();i++) printf("%i ",sol[i]);printf("\n");
	return 0;
}
*/

Compilation message

simurgh.cpp: In function 'void DelEdge(int)':
simurgh.cpp:36:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(j=0;j<E[u].size();j++) if(E[u][j]==e) break;
          ~^~~~~~~~~~~~
simurgh.cpp:37:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=j;i+1<E[u].size();i++) E[u][i]=E[u][i+1];
          ~~~^~~~~~~~~~~~
simurgh.cpp:40:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(j=0;j<E[u].size();j++) if(E[u][j]==e) break;
          ~^~~~~~~~~~~~
simurgh.cpp:41:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=j;i+1<E[u].size();i++) E[u][i]=E[u][i+1];
          ~~~^~~~~~~~~~~~
simurgh.cpp: In function 'void FindTree(int)':
simurgh.cpp:50:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<E[u].size();i++)
              ~^~~~~~~~~~~~
simurgh.cpp: In function 'std::pair<std::vector<int>, int> Extend(std::vector<int>)':
simurgh.cpp:96:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<v.size();i++) DS.Union(edges[v[i]]);
          ~^~~~~~~~~
simurgh.cpp:97:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<T.size();i++) if(DS.Check(edges[T[i]])) DS.Union(edges[T[i]]),v.pb(T[i]),sol+=val[T[i]];
          ~^~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:129:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<tmp.first.size();j++)
           ~^~~~~~~~~~~~~~~~~
simurgh.cpp:132:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(k=0;k<tmp.second.size();k++)
            ~^~~~~~~~~~~~~~~~~~
simurgh.cpp:143:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(j=0;j<tmp.second.size();j++) if(done[tmp.second[j]])
            ~^~~~~~~~~~~~~~~~~~
simurgh.cpp:154:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(k=0;k<tmp.second.size();k++)
              ~^~~~~~~~~~~~~~~~~~
simurgh.cpp:163:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(k=0;k<tmp.second.size();k++)
             ~^~~~~~~~~~~~~~~~~~
simurgh.cpp:172:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<tmp.first.size();j++)
           ~^~~~~~~~~~~~~~~~~
simurgh.cpp:190:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<T.size();i++) if(!done[T[i]])
          ~^~~~~~~~~
simurgh.cpp:213:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(j=0;j<tmp.size();j++) ask[j&1].pb(tmp[j]);
               ~^~~~~~~~~~~
simurgh.cpp:120:6: warning: unused variable 'tsz' [-Wunused-variable]
  int tsz=count_common_roads(T);
      ^~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB correct
2 Correct 2 ms 376 KB correct
3 Correct 3 ms 540 KB correct
4 Correct 2 ms 604 KB correct
5 Correct 2 ms 604 KB correct
6 Correct 2 ms 604 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 2 ms 604 KB correct
9 Correct 2 ms 604 KB correct
10 Correct 2 ms 604 KB correct
11 Correct 2 ms 604 KB correct
12 Correct 2 ms 604 KB correct
13 Correct 2 ms 604 KB correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB correct
2 Correct 2 ms 376 KB correct
3 Correct 3 ms 540 KB correct
4 Correct 2 ms 604 KB correct
5 Correct 2 ms 604 KB correct
6 Correct 2 ms 604 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 2 ms 604 KB correct
9 Correct 2 ms 604 KB correct
10 Correct 2 ms 604 KB correct
11 Correct 2 ms 604 KB correct
12 Correct 2 ms 604 KB correct
13 Correct 2 ms 604 KB correct
14 Correct 6 ms 624 KB correct
15 Correct 4 ms 656 KB correct
16 Correct 6 ms 768 KB correct
17 Correct 4 ms 768 KB correct
18 Correct 4 ms 768 KB correct
19 Correct 5 ms 768 KB correct
20 Correct 4 ms 768 KB correct
21 Correct 5 ms 768 KB correct
22 Correct 4 ms 768 KB correct
23 Correct 3 ms 768 KB correct
24 Correct 5 ms 768 KB correct
25 Correct 3 ms 768 KB correct
26 Correct 3 ms 768 KB correct
27 Correct 4 ms 768 KB correct
28 Correct 3 ms 816 KB correct
29 Correct 4 ms 816 KB correct
30 Correct 4 ms 816 KB correct
31 Correct 4 ms 816 KB correct
32 Correct 4 ms 816 KB correct
33 Correct 4 ms 816 KB correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB correct
2 Correct 2 ms 376 KB correct
3 Correct 3 ms 540 KB correct
4 Correct 2 ms 604 KB correct
5 Correct 2 ms 604 KB correct
6 Correct 2 ms 604 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 2 ms 604 KB correct
9 Correct 2 ms 604 KB correct
10 Correct 2 ms 604 KB correct
11 Correct 2 ms 604 KB correct
12 Correct 2 ms 604 KB correct
13 Correct 2 ms 604 KB correct
14 Correct 6 ms 624 KB correct
15 Correct 4 ms 656 KB correct
16 Correct 6 ms 768 KB correct
17 Correct 4 ms 768 KB correct
18 Correct 4 ms 768 KB correct
19 Correct 5 ms 768 KB correct
20 Correct 4 ms 768 KB correct
21 Correct 5 ms 768 KB correct
22 Correct 4 ms 768 KB correct
23 Correct 3 ms 768 KB correct
24 Correct 5 ms 768 KB correct
25 Correct 3 ms 768 KB correct
26 Correct 3 ms 768 KB correct
27 Correct 4 ms 768 KB correct
28 Correct 3 ms 816 KB correct
29 Correct 4 ms 816 KB correct
30 Correct 4 ms 816 KB correct
31 Correct 4 ms 816 KB correct
32 Correct 4 ms 816 KB correct
33 Correct 4 ms 816 KB correct
34 Correct 103 ms 2312 KB correct
35 Correct 99 ms 2504 KB correct
36 Correct 71 ms 2504 KB correct
37 Correct 16 ms 2504 KB correct
38 Correct 78 ms 2848 KB correct
39 Correct 69 ms 2884 KB correct
40 Correct 58 ms 2884 KB correct
41 Correct 75 ms 3352 KB correct
42 Correct 82 ms 3560 KB correct
43 Correct 42 ms 3560 KB correct
44 Correct 29 ms 3560 KB correct
45 Correct 28 ms 3560 KB correct
46 Correct 22 ms 3560 KB correct
47 Correct 15 ms 3560 KB correct
48 Correct 9 ms 3560 KB correct
49 Correct 9 ms 3560 KB correct
50 Correct 16 ms 3560 KB correct
51 Correct 31 ms 3560 KB correct
52 Correct 29 ms 3560 KB correct
53 Correct 38 ms 3560 KB correct
54 Correct 36 ms 3892 KB correct
55 Correct 40 ms 3892 KB correct
56 Correct 34 ms 3928 KB correct
57 Correct 39 ms 4032 KB correct

Subtask #4
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4032 KB correct
2 Correct 2 ms 4032 KB correct
3 Correct 250 ms 8028 KB correct
4 Correct 432 ms 10812 KB correct
5 Correct 429 ms 11612 KB correct
6 Correct 423 ms 12588 KB correct
7 Correct 463 ms 13460 KB correct
8 Correct 503 ms 14340 KB correct
9 Correct 376 ms 15308 KB correct
10 Correct 434 ms 16264 KB correct
11 Correct 382 ms 17164 KB correct
12 Correct 381 ms 18092 KB correct
13 Correct 2 ms 18092 KB correct
14 Correct 390 ms 19152 KB correct
15 Correct 461 ms 20104 KB correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB correct
2 Correct 2 ms 376 KB correct
3 Correct 3 ms 540 KB correct
4 Correct 2 ms 604 KB correct
5 Correct 2 ms 604 KB correct
6 Correct 2 ms 604 KB correct
7 Correct 2 ms 604 KB correct
8 Correct 2 ms 604 KB correct
9 Correct 2 ms 604 KB correct
10 Correct 2 ms 604 KB correct
11 Correct 2 ms 604 KB correct
12 Correct 2 ms 604 KB correct
13 Correct 2 ms 604 KB correct
14 Correct 6 ms 624 KB correct
15 Correct 4 ms 656 KB correct
16 Correct 6 ms 768 KB correct
17 Correct 4 ms 768 KB correct
18 Correct 4 ms 768 KB correct
19 Correct 5 ms 768 KB correct
20 Correct 4 ms 768 KB correct
21 Correct 5 ms 768 KB correct
22 Correct 4 ms 768 KB correct
23 Correct 3 ms 768 KB correct
24 Correct 5 ms 768 KB correct
25 Correct 3 ms 768 KB correct
26 Correct 3 ms 768 KB correct
27 Correct 4 ms 768 KB correct
28 Correct 3 ms 816 KB correct
29 Correct 4 ms 816 KB correct
30 Correct 4 ms 816 KB correct
31 Correct 4 ms 816 KB correct
32 Correct 4 ms 816 KB correct
33 Correct 4 ms 816 KB correct
34 Correct 103 ms 2312 KB correct
35 Correct 99 ms 2504 KB correct
36 Correct 71 ms 2504 KB correct
37 Correct 16 ms 2504 KB correct
38 Correct 78 ms 2848 KB correct
39 Correct 69 ms 2884 KB correct
40 Correct 58 ms 2884 KB correct
41 Correct 75 ms 3352 KB correct
42 Correct 82 ms 3560 KB correct
43 Correct 42 ms 3560 KB correct
44 Correct 29 ms 3560 KB correct
45 Correct 28 ms 3560 KB correct
46 Correct 22 ms 3560 KB correct
47 Correct 15 ms 3560 KB correct
48 Correct 9 ms 3560 KB correct
49 Correct 9 ms 3560 KB correct
50 Correct 16 ms 3560 KB correct
51 Correct 31 ms 3560 KB correct
52 Correct 29 ms 3560 KB correct
53 Correct 38 ms 3560 KB correct
54 Correct 36 ms 3892 KB correct
55 Correct 40 ms 3892 KB correct
56 Correct 34 ms 3928 KB correct
57 Correct 39 ms 4032 KB correct
58 Correct 3 ms 4032 KB correct
59 Correct 2 ms 4032 KB correct
60 Correct 250 ms 8028 KB correct
61 Correct 432 ms 10812 KB correct
62 Correct 429 ms 11612 KB correct
63 Correct 423 ms 12588 KB correct
64 Correct 463 ms 13460 KB correct
65 Correct 503 ms 14340 KB correct
66 Correct 376 ms 15308 KB correct
67 Correct 434 ms 16264 KB correct
68 Correct 382 ms 17164 KB correct
69 Correct 381 ms 18092 KB correct
70 Correct 2 ms 18092 KB correct
71 Correct 390 ms 19152 KB correct
72 Correct 461 ms 20104 KB correct
73 Correct 2 ms 20104 KB correct
74 Correct 404 ms 20864 KB correct
75 Correct 408 ms 21636 KB correct
76 Correct 229 ms 21636 KB correct
77 Correct 466 ms 23012 KB correct
78 Correct 456 ms 23936 KB correct
79 Correct 425 ms 24732 KB correct
80 Correct 449 ms 25744 KB correct
81 Correct 435 ms 25784 KB correct
82 Correct 436 ms 27440 KB correct
83 Correct 261 ms 27440 KB correct
84 Correct 240 ms 27440 KB correct
85 Correct 146 ms 27440 KB correct
86 Correct 99 ms 27440 KB correct
87 Correct 81 ms 27440 KB correct
88 Correct 63 ms 27440 KB correct
89 Correct 67 ms 27440 KB correct
90 Correct 56 ms 27440 KB correct
91 Correct 22 ms 27440 KB correct
92 Correct 20 ms 27440 KB correct
93 Correct 159 ms 27984 KB correct
94 Correct 114 ms 27984 KB correct
95 Correct 108 ms 27984 KB correct
96 Correct 62 ms 27984 KB correct
97 Correct 70 ms 27984 KB correct
98 Correct 88 ms 27984 KB correct
99 Correct 68 ms 27984 KB correct
100 Correct 33 ms 27984 KB correct
101 Correct 20 ms 27984 KB correct
102 Correct 192 ms 29292 KB correct
103 Correct 185 ms 29884 KB correct
104 Correct 194 ms 30216 KB correct
105 Correct 195 ms 30580 KB correct