oj.uz

Submission #124810

# Submission time Handle Problem Language Result Execution time Memory
124810 2019-07-04T02:28:34 Z nxteru Parachute rings (IOI12_rings) C++14
100 / 100
 1451 ms 104176 KB 
#include <bits/stdc++.h>
using namespace std;
#define PB push_back
int n,par[3][1000005],v1=-1,v2=-1,ins,rps,ino[1000005],rpo[1000005],in[1000005],ts,ans,nx[1000005],vis[1000005],fr=-1,tr[1000005],trs;
bool zr,rpt,rpt2,ok1,ok2;
vector<int>g[1000005];
int find(int q,int x){
	if(par[q][x]==x)return x;
	return par[q][x]=find(q,par[q][x]);
}
bool same(int q,int x,int y){
	return find(q,x)==find(q,y);
}
int unit(int q,int x,int y){
	par[q][find(q,y)]=find(q,x);
}
void Init(int N){
	n=N;
	for(int i=0;i<n;i++)par[0][i]=i,par[1][i]=i,par[2][i]=i,nx[i]=-1;
	ans=n;
}
void check(int v){
	if(ino[v]==ins&&rpo[v]==rps)ans++;
}
void up(int v){
	in[v]++;
	if(in[v]==3){
		trs++;
		tr[v]++;
		for(int i=0;i<g[v].size();i++)tr[g[v][i]]++;
		ans=0;
		ins++;
		if(fr!=-1){
			if(tr[fr]==trs){
				ino[fr]=ins;
				check(fr);
			}
		}else{
			if(tr[v]==trs)ino[v]=ins;
			check(v);
			for(int i=0;i<g[v].size();i++){
				int u=g[v][i];
				if(tr[u]==trs)ino[u]=ins;
				check(u);
			}
		}
	}else if(in[v]==4){
		if(fr==-1){
			fr=v;
			if(tr[v]==trs){
				ins++;
				ino[v]=ins;
				ans=0;
				check(v);
			}else zr=true;
		}else zr=true;
	}
}
void dfs1(int v,int p){
	nx[v]=p;
	for(int i=0;i<g[v].size();i++){
		if(g[v][i]!=p)dfs1(g[v][i],v);
	}
}
void Link(int a,int b){
	if(zr)return;
	if(rpt2){
		ans=0;
		rps++;
		if(same(1,a,b))ok1=false;
		if(same(2,a,b))ok2=false;
		if(v1!=a&&v1!=b)unit(1,a,b);
		if(v2!=a&&v2!=b)unit(2,a,b);
		if(ok1)rpo[v1]=rps;
		if(ok2)rpo[v2]=rps;
		check(v1);
		if(v2!=-1)check(v2);
	}else if(!same(0,a,b)){
		unit(0,a,b);
		if(nx[b]==-1)swap(a,b);
		if(nx[a]==-1&&nx[b]!=-1)dfs1(a,b);
	}else{
		if(!rpt){
			rpt=true;
			dfs1(a,a);
			ans=0;
			rps++;
			int v=b;
			while(1){
				vis[v]=rps;
				rpo[v]=rps;
				check(v);
				if(v==a)break;
				v=nx[v];
			}
		}else{
			rpt2=true;
			if(nx[a]==-1||nx[b]==-1)zr=true;
			else{
				ans=0;
				rps++;
				int v=a,u=b;
				while(vis[v]==0){
					vis[v]=rps;
					v=nx[v];
				}	
				while(vis[u]==0){
					vis[u]=rps;
					u=nx[u];
				}
				if(vis[u]==rps)zr=true;
				if(rpo[v]==rps-1)rpo[v]=rps,ok1=true;
				check(v);
				v1=v;
				if(v!=u){
					v2=u;
					if(rpo[u]==rps-1)rpo[u]=rps,ok2=true;
					check(u);
				}
				if(v1!=-1){
					for(int i=0;i<n;i++){
						for(int j=0;j<g[i].size();j++){
							if(i!=v1&&g[i][j]!=v1)unit(1,i,g[i][j]);
						}
					}
				}
				if(v2!=-1){
					for(int i=0;i<n;i++){
						for(int j=0;j<g[i].size();j++){
							if(i!=v2&&g[i][j]!=v2)unit(2,i,g[i][j]);
						}
					}
				}
			}
		}
	}
	g[a].PB(b);
	g[b].PB(a);
	up(a);
	up(b);
}
int CountCritical() {
	if(zr)return 0;
	return ans;
}

Compilation message

rings.cpp: In function 'int unit(int, int, int)':
rings.cpp:16:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
rings.cpp: In function 'void up(int)':
rings.cpp:30:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<g[v].size();i++)tr[g[v][i]]++;
               ~^~~~~~~~~~~~
rings.cpp:41:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<g[v].size();i++){
                ~^~~~~~~~~~~~
rings.cpp: In function 'void dfs1(int, int)':
rings.cpp:61:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++){
              ~^~~~~~~~~~~~
rings.cpp: In function 'void Link(int, int)':
rings.cpp:122:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int j=0;j<g[i].size();j++){
                   ~^~~~~~~~~~~~
rings.cpp:129:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int j=0;j<g[i].size();j++){
                   ~^~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 25 ms 24056 KB Output is correct
4 Correct 23 ms 23928 KB Output is correct
5 Correct 24 ms 24184 KB Output is correct
6 Correct 25 ms 24312 KB Output is correct
7 Correct 23 ms 24056 KB Output is correct
8 Correct 24 ms 24184 KB Output is correct
9 Correct 25 ms 24184 KB Output is correct
10 Correct 26 ms 24184 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 510 ms 50364 KB Output is correct
2 Correct 1018 ms 64632 KB Output is correct
3 Correct 326 ms 44380 KB Output is correct
4 Correct 1309 ms 77816 KB Output is correct
5 Correct 1312 ms 83704 KB Output is correct
6 Correct 1451 ms 104176 KB Output is correct
7 Correct 315 ms 45304 KB Output is correct
8 Correct 1206 ms 71588 KB Output is correct
9 Correct 1256 ms 74744 KB Output is correct
10 Correct 880 ms 76592 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 25 ms 24056 KB Output is correct
4 Correct 23 ms 23928 KB Output is correct
5 Correct 24 ms 24184 KB Output is correct
6 Correct 25 ms 24312 KB Output is correct
7 Correct 23 ms 24056 KB Output is correct
8 Correct 24 ms 24184 KB Output is correct
9 Correct 25 ms 24184 KB Output is correct
10 Correct 26 ms 24184 KB Output is correct
11 Correct 25 ms 24184 KB Output is correct
12 Correct 27 ms 24568 KB Output is correct
13 Correct 28 ms 24552 KB Output is correct
14 Correct 26 ms 24312 KB Output is correct
15 Correct 26 ms 24568 KB Output is correct
16 Correct 29 ms 24696 KB Output is correct
17 Correct 25 ms 24312 KB Output is correct
18 Correct 26 ms 24568 KB Output is correct
19 Correct 27 ms 24568 KB Output is correct
20 Correct 28 ms 24568 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 25 ms 24056 KB Output is correct
4 Correct 23 ms 23928 KB Output is correct
5 Correct 24 ms 24184 KB Output is correct
6 Correct 25 ms 24312 KB Output is correct
7 Correct 23 ms 24056 KB Output is correct
8 Correct 24 ms 24184 KB Output is correct
9 Correct 25 ms 24184 KB Output is correct
10 Correct 26 ms 24184 KB Output is correct
11 Correct 25 ms 24184 KB Output is correct
12 Correct 27 ms 24568 KB Output is correct
13 Correct 28 ms 24552 KB Output is correct
14 Correct 26 ms 24312 KB Output is correct
15 Correct 26 ms 24568 KB Output is correct
16 Correct 29 ms 24696 KB Output is correct
17 Correct 25 ms 24312 KB Output is correct
18 Correct 26 ms 24568 KB Output is correct
19 Correct 27 ms 24568 KB Output is correct
20 Correct 28 ms 24568 KB Output is correct
21 Correct 44 ms 26360 KB Output is correct
22 Correct 59 ms 27640 KB Output is correct
23 Correct 70 ms 28664 KB Output is correct
24 Correct 77 ms 28408 KB Output is correct
25 Correct 41 ms 26744 KB Output is correct
26 Correct 75 ms 29560 KB Output is correct
27 Correct 75 ms 29048 KB Output is correct
28 Correct 50 ms 27000 KB Output is correct
29 Correct 50 ms 27384 KB Output is correct
30 Correct 97 ms 31352 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 24 ms 24056 KB Output is correct
3 Correct 25 ms 24056 KB Output is correct
4 Correct 23 ms 23928 KB Output is correct
5 Correct 24 ms 24184 KB Output is correct
6 Correct 25 ms 24312 KB Output is correct
7 Correct 23 ms 24056 KB Output is correct
8 Correct 24 ms 24184 KB Output is correct
9 Correct 25 ms 24184 KB Output is correct
10 Correct 26 ms 24184 KB Output is correct
11 Correct 510 ms 50364 KB Output is correct
12 Correct 1018 ms 64632 KB Output is correct
13 Correct 326 ms 44380 KB Output is correct
14 Correct 1309 ms 77816 KB Output is correct
15 Correct 1312 ms 83704 KB Output is correct
16 Correct 1451 ms 104176 KB Output is correct
17 Correct 315 ms 45304 KB Output is correct
18 Correct 1206 ms 71588 KB Output is correct
19 Correct 1256 ms 74744 KB Output is correct
20 Correct 880 ms 76592 KB Output is correct
21 Correct 25 ms 24184 KB Output is correct
22 Correct 27 ms 24568 KB Output is correct
23 Correct 28 ms 24552 KB Output is correct
24 Correct 26 ms 24312 KB Output is correct
25 Correct 26 ms 24568 KB Output is correct
26 Correct 29 ms 24696 KB Output is correct
27 Correct 25 ms 24312 KB Output is correct
28 Correct 26 ms 24568 KB Output is correct
29 Correct 27 ms 24568 KB Output is correct
30 Correct 28 ms 24568 KB Output is correct
31 Correct 44 ms 26360 KB Output is correct
32 Correct 59 ms 27640 KB Output is correct
33 Correct 70 ms 28664 KB Output is correct
34 Correct 77 ms 28408 KB Output is correct
35 Correct 41 ms 26744 KB Output is correct
36 Correct 75 ms 29560 KB Output is correct
37 Correct 75 ms 29048 KB Output is correct
38 Correct 50 ms 27000 KB Output is correct
39 Correct 50 ms 27384 KB Output is correct
40 Correct 97 ms 31352 KB Output is correct
41 Correct 274 ms 46008 KB Output is correct
42 Correct 547 ms 63324 KB Output is correct
43 Correct 293 ms 52768 KB Output is correct
44 Correct 308 ms 57712 KB Output is correct
45 Correct 523 ms 69596 KB Output is correct
46 Correct 831 ms 78456 KB Output is correct
47 Correct 1278 ms 99224 KB Output is correct
48 Correct 280 ms 52604 KB Output is correct
49 Correct 828 ms 79468 KB Output is correct
50 Correct 877 ms 79060 KB Output is correct
51 Correct 338 ms 51380 KB Output is correct
52 Correct 290 ms 51068 KB Output is correct
53 Correct 263 ms 52728 KB Output is correct
54 Correct 1040 ms 76920 KB Output is correct
55 Correct 1158 ms 81276 KB Output is correct