oj.uz

Submission #124503

# Submission time Handle Problem Language Result Execution time Memory
124503 2019-07-03T12:44:08 Z nxteru Parachute rings (IOI12_rings) C++14
37 / 100
 1520 ms 96504 KB 
#include <bits/stdc++.h>
using namespace std;
#define PB push_back
int n,par[1000005],ins,rps,ino[1000005],rpo[1000005],in[1000005],ts,ans,nx[1000005],vis[1000005],fr=-1,tr[1000005],trs;
bool zr,rpt;
vector<int>g[1000005];
int find(int x){
	if(par[x]==x)return x;
	return par[x]=find(par[x]);
}
bool same(int x,int y){
	return find(x)==find(y);
}
int unit(int x,int y){
	par[find(y)]=find(x);
}
void Init(int N){
	n=N;
	for(int i=0;i<n;i++)par[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(!same(a,b)){
		unit(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{
			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;
				check(v);
				if(v!=u){
					if(rpo[u]==rps-1)rpo[u]=rps;
					check(u);
				}
			}
		}
	}
	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)':
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++){
              ~^~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 25 ms 24056 KB Output is correct
3 Correct 26 ms 24056 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 25 ms 24184 KB Output is correct
6 Correct 26 ms 24312 KB Output is correct
7 Correct 24 ms 23928 KB Output is correct
8 Correct 25 ms 24056 KB Output is correct
9 Correct 26 ms 24092 KB Output is correct
10 Correct 26 ms 24056 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 495 ms 46304 KB Output is correct
2 Correct 1022 ms 58320 KB Output is correct
3 Correct 309 ms 36472 KB Output is correct
4 Correct 1362 ms 70040 KB Output is correct
5 Correct 1304 ms 75660 KB Output is correct
6 Correct 1520 ms 96504 KB Output is correct
7 Correct 310 ms 37624 KB Output is correct
8 Correct 1193 ms 64236 KB Output is correct
9 Correct 1228 ms 67056 KB Output is correct
10 Correct 896 ms 68760 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 25 ms 24056 KB Output is correct
3 Correct 26 ms 24056 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 25 ms 24184 KB Output is correct
6 Correct 26 ms 24312 KB Output is correct
7 Correct 24 ms 23928 KB Output is correct
8 Correct 25 ms 24056 KB Output is correct
9 Correct 26 ms 24092 KB Output is correct
10 Correct 26 ms 24056 KB Output is correct
11 Correct 26 ms 24188 KB Output is correct
12 Correct 28 ms 24568 KB Output is correct
13 Correct 29 ms 24616 KB Output is correct
14 Incorrect 33 ms 24412 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 25 ms 24056 KB Output is correct
3 Correct 26 ms 24056 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 25 ms 24184 KB Output is correct
6 Correct 26 ms 24312 KB Output is correct
7 Correct 24 ms 23928 KB Output is correct
8 Correct 25 ms 24056 KB Output is correct
9 Correct 26 ms 24092 KB Output is correct
10 Correct 26 ms 24056 KB Output is correct
11 Correct 26 ms 24188 KB Output is correct
12 Correct 28 ms 24568 KB Output is correct
13 Correct 29 ms 24616 KB Output is correct
14 Incorrect 33 ms 24412 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 23800 KB Output is correct
2 Correct 25 ms 24056 KB Output is correct
3 Correct 26 ms 24056 KB Output is correct
4 Correct 24 ms 23928 KB Output is correct
5 Correct 25 ms 24184 KB Output is correct
6 Correct 26 ms 24312 KB Output is correct
7 Correct 24 ms 23928 KB Output is correct
8 Correct 25 ms 24056 KB Output is correct
9 Correct 26 ms 24092 KB Output is correct
10 Correct 26 ms 24056 KB Output is correct
11 Correct 495 ms 46304 KB Output is correct
12 Correct 1022 ms 58320 KB Output is correct
13 Correct 309 ms 36472 KB Output is correct
14 Correct 1362 ms 70040 KB Output is correct
15 Correct 1304 ms 75660 KB Output is correct
16 Correct 1520 ms 96504 KB Output is correct
17 Correct 310 ms 37624 KB Output is correct
18 Correct 1193 ms 64236 KB Output is correct
19 Correct 1228 ms 67056 KB Output is correct
20 Correct 896 ms 68760 KB Output is correct
21 Correct 26 ms 24188 KB Output is correct
22 Correct 28 ms 24568 KB Output is correct
23 Correct 29 ms 24616 KB Output is correct
24 Incorrect 33 ms 24412 KB Output isn't correct
25 Halted 0 ms 0 KB -