Submission #4194

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
4194	2013-09-04T03:05:04 Z	cki86201	Parachute rings (IOI12_rings)	C++	100 / 100	1503 ms	75104 KB

rings

int N;
const int MN = 1000010;
struct str{
	int p[MN],r[MN];
	int deg[MN];
	int px;
	bool ch;
	void init(int x){
		int i;
		for(i=0;i<N;i++){deg[i]=0,p[i]=i,r[i]=1;}
		px=x,ch=true;
	}
	int Find(int x){
		while(x!=p[x])x=p[x];
		return x;
	}
	bool Union(int x,int y){
		deg[x]++,deg[y]++;
		int a=Find(x),b=Find(y);
		if(a==b)return true;
		if(r[a]>r[b]){p[b]=a,r[a]+=r[b],r[b]=0;}
		else{p[a]=b,r[b]+=r[a],r[a]=0;}
		return false;
	}
}ring[5];
int ans;
int cnt;
bool flag_3;
bool flag_cycle;
int st[MN],en[MN<<1],next[MN<<1];
int in[MN][2];

void addedge(int s,int d,int c)
{
	next[c]=st[s];
	st[s]=c;
	en[c]=d;
}

void Init(int N_){
	ans = N = N_;
	ring[0].init(0);
}

void make_ring(int arr[])
{
	int i,j;
	for(i=0;i<4;i++){
		ring[i].init(arr[i]);
		for(j=1;j<=cnt;j++){
			if(in[j][0]==arr[i]||in[j][1]==arr[i])continue;
			if(ring[i].Union(in[j][0],in[j][1]))ring[i].ch=false;
			if(ring[i].deg[in[j][0]]>=3 || ring[i].deg[in[j][1]]>=3)ring[i].ch=false;
		}
	}
}

void Link(int A, int B){
	cnt++;
	addedge(A,B,2*cnt);
	addedge(B,A,2*cnt+1);
	in[cnt][0]=A,in[cnt][1]=B;
	if(flag_3){
		int i;
		for(i=0;i<4;i++){
			if(A!=ring[i].px && B!=ring[i].px){
				if(ring[i].Union(A,B))ring[i].ch=false;
				if(ring[i].deg[A]>=3 || ring[i].deg[B]>=3)ring[i].ch=false;
			}
		}
		return;
	}
	if(ring[0].Union(A,B)){
		if(flag_cycle)ans=0;
		else{
			int ta=ring[0].Find(A);
			ans=ring[0].r[ta];
			flag_cycle=1;
		}
	}
	if(ring[0].deg[A]>=3){
		int arr[5]={A};
		int i,tmp=1;
		for(i=st[A];i;i=next[i]){
			arr[tmp++]=en[i];
		}
		make_ring(arr);
		flag_3 = true;
	}
	else if(ring[0].deg[B]>=3){
		int arr[5]={B};
		int i,tmp=1;
		for(i=st[B];i;i=next[i]){
			arr[tmp++]=en[i];
		}
		make_ring(arr);
		flag_3 = true;
	}
}

int CountCritical(){
	if(flag_3){
		int i,ret=0;
		for(i=0;i<4;i++){
			if(ring[i].ch)ret++;
		}
		return ret;
	}
	return ans;
}

Subtask #1
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	4 ms	756 KB	Output is correct
3	Correct	4 ms	920 KB	Output is correct
4	Correct	2 ms	920 KB	Output is correct
5	Correct	3 ms	920 KB	Output is correct
6	Correct	3 ms	920 KB	Output is correct
7	Correct	2 ms	920 KB	Output is correct
8	Correct	3 ms	920 KB	Output is correct
9	Correct	4 ms	972 KB	Output is correct
10	Correct	6 ms	1096 KB	Output is correct

Subtask #2
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	266 ms	20832 KB	Output is correct
2	Correct	1122 ms	60196 KB	Output is correct
3	Correct	1503 ms	73792 KB	Output is correct
4	Correct	610 ms	73792 KB	Output is correct
5	Correct	601 ms	73792 KB	Output is correct
6	Correct	570 ms	73792 KB	Output is correct
7	Correct	1337 ms	73792 KB	Output is correct
8	Correct	1123 ms	73792 KB	Output is correct
9	Correct	1095 ms	75104 KB	Output is correct
10	Correct	495 ms	75104 KB	Output is correct

Subtask #3
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	4 ms	756 KB	Output is correct
3	Correct	4 ms	920 KB	Output is correct
4	Correct	2 ms	920 KB	Output is correct
5	Correct	3 ms	920 KB	Output is correct
6	Correct	3 ms	920 KB	Output is correct
7	Correct	2 ms	920 KB	Output is correct
8	Correct	3 ms	920 KB	Output is correct
9	Correct	4 ms	972 KB	Output is correct
10	Correct	6 ms	1096 KB	Output is correct
11	Correct	4 ms	75104 KB	Output is correct
12	Correct	7 ms	75104 KB	Output is correct
13	Correct	7 ms	75104 KB	Output is correct
14	Correct	5 ms	75104 KB	Output is correct
15	Correct	5 ms	75104 KB	Output is correct
16	Correct	5 ms	75104 KB	Output is correct
17	Correct	6 ms	75104 KB	Output is correct
18	Correct	8 ms	75104 KB	Output is correct
19	Correct	5 ms	75104 KB	Output is correct
20	Correct	6 ms	75104 KB	Output is correct

Subtask #4
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	4 ms	756 KB	Output is correct
3	Correct	4 ms	920 KB	Output is correct
4	Correct	2 ms	920 KB	Output is correct
5	Correct	3 ms	920 KB	Output is correct
6	Correct	3 ms	920 KB	Output is correct
7	Correct	2 ms	920 KB	Output is correct
8	Correct	3 ms	920 KB	Output is correct
9	Correct	4 ms	972 KB	Output is correct
10	Correct	6 ms	1096 KB	Output is correct
11	Correct	4 ms	75104 KB	Output is correct
12	Correct	7 ms	75104 KB	Output is correct
13	Correct	7 ms	75104 KB	Output is correct
14	Correct	5 ms	75104 KB	Output is correct
15	Correct	5 ms	75104 KB	Output is correct
16	Correct	5 ms	75104 KB	Output is correct
17	Correct	6 ms	75104 KB	Output is correct
18	Correct	8 ms	75104 KB	Output is correct
19	Correct	5 ms	75104 KB	Output is correct
20	Correct	6 ms	75104 KB	Output is correct
21	Correct	18 ms	75104 KB	Output is correct
22	Correct	28 ms	75104 KB	Output is correct
23	Correct	34 ms	75104 KB	Output is correct
24	Correct	44 ms	75104 KB	Output is correct
25	Correct	20 ms	75104 KB	Output is correct
26	Correct	43 ms	75104 KB	Output is correct
27	Correct	37 ms	75104 KB	Output is correct
28	Correct	45 ms	75104 KB	Output is correct
29	Correct	37 ms	75104 KB	Output is correct
30	Correct	38 ms	75104 KB	Output is correct

Subtask #5
31.0 / 31.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	4 ms	756 KB	Output is correct
3	Correct	4 ms	920 KB	Output is correct
4	Correct	2 ms	920 KB	Output is correct
5	Correct	3 ms	920 KB	Output is correct
6	Correct	3 ms	920 KB	Output is correct
7	Correct	2 ms	920 KB	Output is correct
8	Correct	3 ms	920 KB	Output is correct
9	Correct	4 ms	972 KB	Output is correct
10	Correct	6 ms	1096 KB	Output is correct
11	Correct	266 ms	20832 KB	Output is correct
12	Correct	1122 ms	60196 KB	Output is correct
13	Correct	1503 ms	73792 KB	Output is correct
14	Correct	610 ms	73792 KB	Output is correct
15	Correct	601 ms	73792 KB	Output is correct
16	Correct	570 ms	73792 KB	Output is correct
17	Correct	1337 ms	73792 KB	Output is correct
18	Correct	1123 ms	73792 KB	Output is correct
19	Correct	1095 ms	75104 KB	Output is correct
20	Correct	495 ms	75104 KB	Output is correct
21	Correct	4 ms	75104 KB	Output is correct
22	Correct	7 ms	75104 KB	Output is correct
23	Correct	7 ms	75104 KB	Output is correct
24	Correct	5 ms	75104 KB	Output is correct
25	Correct	5 ms	75104 KB	Output is correct
26	Correct	5 ms	75104 KB	Output is correct
27	Correct	6 ms	75104 KB	Output is correct
28	Correct	8 ms	75104 KB	Output is correct
29	Correct	5 ms	75104 KB	Output is correct
30	Correct	6 ms	75104 KB	Output is correct
31	Correct	18 ms	75104 KB	Output is correct
32	Correct	28 ms	75104 KB	Output is correct
33	Correct	34 ms	75104 KB	Output is correct
34	Correct	44 ms	75104 KB	Output is correct
35	Correct	20 ms	75104 KB	Output is correct
36	Correct	43 ms	75104 KB	Output is correct
37	Correct	37 ms	75104 KB	Output is correct
38	Correct	45 ms	75104 KB	Output is correct
39	Correct	37 ms	75104 KB	Output is correct
40	Correct	38 ms	75104 KB	Output is correct
41	Correct	178 ms	75104 KB	Output is correct
42	Correct	516 ms	75104 KB	Output is correct
43	Correct	317 ms	75104 KB	Output is correct
44	Correct	699 ms	75104 KB	Output is correct
45	Correct	926 ms	75104 KB	Output is correct
46	Correct	482 ms	75104 KB	Output is correct
47	Correct	516 ms	75104 KB	Output is correct
48	Correct	577 ms	75104 KB	Output is correct
49	Correct	473 ms	75104 KB	Output is correct
50	Correct	487 ms	75104 KB	Output is correct
51	Correct	369 ms	75104 KB	Output is correct
52	Correct	618 ms	75104 KB	Output is correct
53	Correct	579 ms	75104 KB	Output is correct
54	Correct	1104 ms	75104 KB	Output is correct
55	Correct	1428 ms	75104 KB	Output is correct

Submission #4194

Compilation message

Subtask #1 20.0 / 20.0

Subtask #2 17.0 / 17.0

Subtask #3 18.0 / 18.0

Subtask #4 14.0 / 14.0

Subtask #5 31.0 / 31.0

Subtask #1
20.0 / 20.0

Subtask #2
17.0 / 17.0

Subtask #3
18.0 / 18.0

Subtask #4
14.0 / 14.0

Subtask #5
31.0 / 31.0