oj.uz

Submission #287814

# Submission time Handle Problem Language Result Execution time Memory
287814 2020-09-01T02:40:57 Z tinjyu Parachute rings (IOI12_rings) C++14
100 / 100
 1617 ms 87544 KB 
#include <iostream>
using namespace std;
int w,x,y,z,n,f[1000005][4],count[1000005][4],st[1000005][4],en[1000005][4],deg[1000005],tree[4],circle[4],cnt,a[1000005],b[1000005],c;

void Init(int N_) {

  n = N_;
	for(int i=0;i<n;i++)
	{
		for(int j=0;j<=3;j++)
		{
			f[i][j]=i;
			st[i][j]=i;
			en[i][j]=i;
			count[i][j]=1;
		}
	}
}
int find(int x,int a)
{
	if(f[x][a]==x)return x;
	else return f[x][a]=find(f[x][a],a);
}
int link(int x,int y,int a)
{
	int fx=find(x,a),fy=find(y,a);
	if(fx==fy)
	{
		if((st[fx][a]==x && en[fx][a]==y) || (st[fx][a]==y && en[fx][a]==x))
		{
			if(circle[a]!=0)circle[a]=-1;
			else circle[a]=count[fx][a];
		}
		else tree[a]=1;
		return 0;
	}
	if((st[fx][a]!=x && en[fx][a]!=x) || (st[fy][a]!=y && en[fy][a]!=y))
	{
		tree[a]=1;
		return 0;
	}
	f[fx][a]=fy;
	count[fy][a]+=count[fx][a];
	int ns,ne;
	if(st[fy][a]==y)ns=en[fy][a];
	else ns=st[fy][a];
	if(st[fx][a]==x)ne=en[fx][a];
	else ne=st[fx][a];
	st[fy][a]=ns;
	en[fy][a]=ne;
	return 0;
}
void Link(int A, int B) {
	cnt++;
	a[cnt]=A;
	b[cnt]=B;
	deg[A]++;
	deg[B]++;
	if((deg[A]==3 || deg[B]==3) && c==0)
	{
		c=1;
		w,x=-1,y=-1,z=-1;
		if(deg[A]==3)w=A;
		else w=B;
		for(int i=1;i<=cnt;i++)
		{
			if(a[i]==w)
			{
				if(x==-1)x=b[i];
				else if(y==-1)y=b[i];
				else z=b[i];
			}
			else if(b[i]==w)
			{
				if(x==-1)x=a[i];
				else if(y==-1)y=a[i];
				else z=a[i];			
			}
		}
		for(int j=0;j<=3;j++)
		{
			tree[j]=0;
			circle[j]=0;
			for(int i=0;i<n;i++)
			{
				f[i][j]=i;
				count[i][j]=1;
				st[i][j]=i;
				en[i][j]=i;
			}
			for(int i=1;i<=cnt;i++)
			{
				if(j==0 && (a[i]==w || b[i]==w))continue;
				if(j==1 && (a[i]==x || b[i]==x))continue;
				if(j==2 && (a[i]==y || b[i]==y))continue;
				if(j==3 && (a[i]==z || b[i]==z))continue;
				link(a[i],b[i],j);
			}
		}
	}
	else if(c==1)
	{
		for(int i=0;i<=3;i++)
		{
			if(i==0 && (a[cnt]==w || b[cnt]==w))continue;
			if(i==1 && (a[cnt]==x || b[cnt]==x))continue;
			if(i==2 && (a[cnt]==y || b[cnt]==y))continue;
			if(i==3 && (a[cnt]==z || b[cnt]==z))continue;
			link(a[cnt],b[cnt],i);
		}
	}
	else link(a[cnt],b[cnt],0);
	return ;
}

int CountCritical() {
	if(c==1)
	{
		int ans=0;
		if(circle[0]==0 && tree[0]==0)ans++;
		if(circle[1]==0 && tree[1]==0)ans++;
		if(circle[2]==0 && tree[2]==0)ans++;
		if(circle[3]==0 && tree[3]==0)ans++;
		return ans;
	}
	if(circle[0]==0)return n;
	if(circle[0]==-1)return 0;
	return circle[0];
}

Compilation message

rings.cpp: In function 'void Link(int, int)':
rings.cpp:62:3: warning: left operand of comma operator has no effect [-Wunused-value]
   62 |   w,x=-1,y=-1,z=-1;
      |   ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 2 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 336 ms 39232 KB Output is correct
2 Correct 863 ms 59896 KB Output is correct
3 Correct 800 ms 79252 KB Output is correct
4 Correct 785 ms 79736 KB Output is correct
5 Correct 794 ms 79608 KB Output is correct
6 Correct 752 ms 78968 KB Output is correct
7 Correct 755 ms 78968 KB Output is correct
8 Correct 1346 ms 74872 KB Output is correct
9 Correct 1617 ms 79892 KB Output is correct
10 Correct 678 ms 87544 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 2 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 3 ms 768 KB Output is correct
12 Correct 5 ms 1408 KB Output is correct
13 Correct 5 ms 1280 KB Output is correct
14 Correct 4 ms 1152 KB Output is correct
15 Correct 4 ms 1920 KB Output is correct
16 Correct 4 ms 1280 KB Output is correct
17 Correct 5 ms 1280 KB Output is correct
18 Correct 6 ms 1920 KB Output is correct
19 Correct 4 ms 1280 KB Output is correct
20 Correct 5 ms 1280 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 2 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 3 ms 768 KB Output is correct
12 Correct 5 ms 1408 KB Output is correct
13 Correct 5 ms 1280 KB Output is correct
14 Correct 4 ms 1152 KB Output is correct
15 Correct 4 ms 1920 KB Output is correct
16 Correct 4 ms 1280 KB Output is correct
17 Correct 5 ms 1280 KB Output is correct
18 Correct 6 ms 1920 KB Output is correct
19 Correct 4 ms 1280 KB Output is correct
20 Correct 5 ms 1280 KB Output is correct
21 Correct 20 ms 4480 KB Output is correct
22 Correct 36 ms 6904 KB Output is correct
23 Correct 44 ms 8696 KB Output is correct
24 Correct 48 ms 7928 KB Output is correct
25 Correct 18 ms 7424 KB Output is correct
26 Correct 47 ms 8184 KB Output is correct
27 Correct 51 ms 7800 KB Output is correct
28 Correct 52 ms 8056 KB Output is correct
29 Correct 42 ms 8056 KB Output is correct
30 Correct 58 ms 8824 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 2 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 336 ms 39232 KB Output is correct
12 Correct 863 ms 59896 KB Output is correct
13 Correct 800 ms 79252 KB Output is correct
14 Correct 785 ms 79736 KB Output is correct
15 Correct 794 ms 79608 KB Output is correct
16 Correct 752 ms 78968 KB Output is correct
17 Correct 755 ms 78968 KB Output is correct
18 Correct 1346 ms 74872 KB Output is correct
19 Correct 1617 ms 79892 KB Output is correct
20 Correct 678 ms 87544 KB Output is correct
21 Correct 3 ms 768 KB Output is correct
22 Correct 5 ms 1408 KB Output is correct
23 Correct 5 ms 1280 KB Output is correct
24 Correct 4 ms 1152 KB Output is correct
25 Correct 4 ms 1920 KB Output is correct
26 Correct 4 ms 1280 KB Output is correct
27 Correct 5 ms 1280 KB Output is correct
28 Correct 6 ms 1920 KB Output is correct
29 Correct 4 ms 1280 KB Output is correct
30 Correct 5 ms 1280 KB Output is correct
31 Correct 20 ms 4480 KB Output is correct
32 Correct 36 ms 6904 KB Output is correct
33 Correct 44 ms 8696 KB Output is correct
34 Correct 48 ms 7928 KB Output is correct
35 Correct 18 ms 7424 KB Output is correct
36 Correct 47 ms 8184 KB Output is correct
37 Correct 51 ms 7800 KB Output is correct
38 Correct 52 ms 8056 KB Output is correct
39 Correct 42 ms 8056 KB Output is correct
40 Correct 58 ms 8824 KB Output is correct
41 Correct 217 ms 40944 KB Output is correct
42 Correct 648 ms 68856 KB Output is correct
43 Correct 299 ms 67832 KB Output is correct
44 Correct 652 ms 81276 KB Output is correct
45 Correct 595 ms 80760 KB Output is correct
46 Correct 641 ms 73720 KB Output is correct
47 Correct 712 ms 75040 KB Output is correct
48 Correct 457 ms 77432 KB Output is correct
49 Correct 575 ms 85240 KB Output is correct
50 Correct 598 ms 83832 KB Output is correct
51 Correct 293 ms 59000 KB Output is correct
52 Correct 585 ms 65912 KB Output is correct
53 Correct 444 ms 76920 KB Output is correct
54 Correct 1068 ms 72312 KB Output is correct
55 Correct 791 ms 78136 KB Output is correct