Submission #351190

# Submission time Handle Problem Language Result Execution time Memory
351190 2021-01-19T14:57:40 Z juggernaut Parachute rings (IOI12_rings) C++14
100 / 100
1490 ms 99108 KB
//JUST UNDERSTANDED THE MAIN IDEA
#include <bits/stdc++.h>
using namespace std;
#define SZ 1234567
#define pb push_back
vector<int> adj[SZ];
int n,stage,ff[SZ],d[4],sz[SZ];
int gf(int x) {return ff[x]?ff[x]=gf(ff[x]):x;}
vector<int> ps;
void uni(int a,int b)
{
	a=gf(a),b=gf(b);
	if(a==b) ps.pb(a);
	else ff[a]=b,sz[b]+=sz[a];
}
void Init(int N_)
{
	n=N_; stage=0;
	for(int i=1;i<=n;++i) sz[i]=1;
}
struct DS
{
int u,good=1;
int ff[SZ],deg[SZ];
int gf(int x) {return ff[x]?ff[x]=gf(ff[x]):x;}
void init(int t)
{
	u=t;
}
void adde(int a,int b)
{
	if(a==u||b==u) return;
	good&=(++deg[a])<=2;
	good&=(++deg[b])<=2;
	a=gf(a),b=gf(b);
	if(a==b) good=0;
	else ff[a]=b;
}
int calc()
{return good;}
}S[4];
void rebuild(int t)
{
	for(int i=0;i<3;++i) S[i].init(adj[t][i]);
	S[3].init(t);
	for(int i=1;i<=n;++i)
		for(auto b:adj[i]) if(i<b)
			for(int k=0;k<4;++k)
				S[k].adde(i,b);
}
void Link(int x,int y) 
{
	++x,++y;
	if(!stage){
		adj[x].pb(y); adj[y].pb(x);
		uni(x,y);
		if(adj[y].size()>=3) swap(x,y);
		if(adj[x].size()>=3)
			stage=1, rebuild(x);
	}
	else{
		for(int j=0;j<4;++j)
			S[j].adde(x,y);
	}
}
int CountCritical(){
	if(!stage)
	{
		if(ps.size()>=2) return 0;
		if(ps.size()==0) return n;
		return sz[gf(ps[0])];
	}
	else
		return S[0].calc()+S[1].calc()+S[2].calc()+S[3].calc();
}
# Verdict Execution time Memory Grader output
1 Correct 20 ms 29292 KB Output is correct
2 Correct 22 ms 29676 KB Output is correct
3 Correct 22 ms 29676 KB Output is correct
4 Correct 20 ms 29420 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 23 ms 29548 KB Output is correct
7 Correct 21 ms 29548 KB Output is correct
8 Correct 22 ms 29548 KB Output is correct
9 Correct 22 ms 29676 KB Output is correct
10 Correct 22 ms 29676 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 450 ms 49772 KB Output is correct
2 Correct 901 ms 74748 KB Output is correct
3 Correct 1490 ms 69100 KB Output is correct
4 Correct 1105 ms 68460 KB Output is correct
5 Correct 1107 ms 68492 KB Output is correct
6 Correct 1109 ms 67536 KB Output is correct
7 Correct 1329 ms 69060 KB Output is correct
8 Correct 1282 ms 92396 KB Output is correct
9 Correct 1455 ms 99108 KB Output is correct
10 Correct 729 ms 68076 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 20 ms 29292 KB Output is correct
2 Correct 22 ms 29676 KB Output is correct
3 Correct 22 ms 29676 KB Output is correct
4 Correct 20 ms 29420 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 23 ms 29548 KB Output is correct
7 Correct 21 ms 29548 KB Output is correct
8 Correct 22 ms 29548 KB Output is correct
9 Correct 22 ms 29676 KB Output is correct
10 Correct 22 ms 29676 KB Output is correct
11 Correct 22 ms 29676 KB Output is correct
12 Correct 25 ms 30060 KB Output is correct
13 Correct 25 ms 30060 KB Output is correct
14 Correct 25 ms 29804 KB Output is correct
15 Correct 25 ms 30188 KB Output is correct
16 Correct 26 ms 29804 KB Output is correct
17 Correct 24 ms 29804 KB Output is correct
18 Correct 24 ms 30316 KB Output is correct
19 Correct 28 ms 29804 KB Output is correct
20 Correct 26 ms 30060 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 20 ms 29292 KB Output is correct
2 Correct 22 ms 29676 KB Output is correct
3 Correct 22 ms 29676 KB Output is correct
4 Correct 20 ms 29420 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 23 ms 29548 KB Output is correct
7 Correct 21 ms 29548 KB Output is correct
8 Correct 22 ms 29548 KB Output is correct
9 Correct 22 ms 29676 KB Output is correct
10 Correct 22 ms 29676 KB Output is correct
11 Correct 22 ms 29676 KB Output is correct
12 Correct 25 ms 30060 KB Output is correct
13 Correct 25 ms 30060 KB Output is correct
14 Correct 25 ms 29804 KB Output is correct
15 Correct 25 ms 30188 KB Output is correct
16 Correct 26 ms 29804 KB Output is correct
17 Correct 24 ms 29804 KB Output is correct
18 Correct 24 ms 30316 KB Output is correct
19 Correct 28 ms 29804 KB Output is correct
20 Correct 26 ms 30060 KB Output is correct
21 Correct 39 ms 30876 KB Output is correct
22 Correct 61 ms 31596 KB Output is correct
23 Correct 57 ms 32236 KB Output is correct
24 Correct 65 ms 33004 KB Output is correct
25 Correct 36 ms 33132 KB Output is correct
26 Correct 64 ms 33408 KB Output is correct
27 Correct 83 ms 33004 KB Output is correct
28 Correct 56 ms 33004 KB Output is correct
29 Correct 50 ms 33772 KB Output is correct
30 Correct 79 ms 33260 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 20 ms 29292 KB Output is correct
2 Correct 22 ms 29676 KB Output is correct
3 Correct 22 ms 29676 KB Output is correct
4 Correct 20 ms 29420 KB Output is correct
5 Correct 21 ms 29568 KB Output is correct
6 Correct 23 ms 29548 KB Output is correct
7 Correct 21 ms 29548 KB Output is correct
8 Correct 22 ms 29548 KB Output is correct
9 Correct 22 ms 29676 KB Output is correct
10 Correct 22 ms 29676 KB Output is correct
11 Correct 450 ms 49772 KB Output is correct
12 Correct 901 ms 74748 KB Output is correct
13 Correct 1490 ms 69100 KB Output is correct
14 Correct 1105 ms 68460 KB Output is correct
15 Correct 1107 ms 68492 KB Output is correct
16 Correct 1109 ms 67536 KB Output is correct
17 Correct 1329 ms 69060 KB Output is correct
18 Correct 1282 ms 92396 KB Output is correct
19 Correct 1455 ms 99108 KB Output is correct
20 Correct 729 ms 68076 KB Output is correct
21 Correct 22 ms 29676 KB Output is correct
22 Correct 25 ms 30060 KB Output is correct
23 Correct 25 ms 30060 KB Output is correct
24 Correct 25 ms 29804 KB Output is correct
25 Correct 25 ms 30188 KB Output is correct
26 Correct 26 ms 29804 KB Output is correct
27 Correct 24 ms 29804 KB Output is correct
28 Correct 24 ms 30316 KB Output is correct
29 Correct 28 ms 29804 KB Output is correct
30 Correct 26 ms 30060 KB Output is correct
31 Correct 39 ms 30876 KB Output is correct
32 Correct 61 ms 31596 KB Output is correct
33 Correct 57 ms 32236 KB Output is correct
34 Correct 65 ms 33004 KB Output is correct
35 Correct 36 ms 33132 KB Output is correct
36 Correct 64 ms 33408 KB Output is correct
37 Correct 83 ms 33004 KB Output is correct
38 Correct 56 ms 33004 KB Output is correct
39 Correct 50 ms 33772 KB Output is correct
40 Correct 79 ms 33260 KB Output is correct
41 Correct 236 ms 41980 KB Output is correct
42 Correct 623 ms 74960 KB Output is correct
43 Correct 343 ms 63980 KB Output is correct
44 Correct 642 ms 66028 KB Output is correct
45 Correct 968 ms 70508 KB Output is correct
46 Correct 718 ms 62700 KB Output is correct
47 Correct 963 ms 63468 KB Output is correct
48 Correct 433 ms 70636 KB Output is correct
49 Correct 708 ms 62956 KB Output is correct
50 Correct 740 ms 62572 KB Output is correct
51 Correct 295 ms 60524 KB Output is correct
52 Correct 618 ms 59056 KB Output is correct
53 Correct 414 ms 69868 KB Output is correct
54 Correct 1061 ms 80492 KB Output is correct
55 Correct 810 ms 64464 KB Output is correct