답안 #4194

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
4194 2013-09-04T03:05:04 Z cki86201 낙하산 고리들 (IOI12_rings) C++
100 / 100
1503 ms 75104 KB
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;
}
# 결과 실행 시간 메모리 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
# 결과 실행 시간 메모리 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
# 결과 실행 시간 메모리 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
# 결과 실행 시간 메모리 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
# 결과 실행 시간 메모리 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