oj.uz

Submission #357265

# Submission time Handle Problem Language Result Execution time Memory
357265 2021-01-24T03:32:44 Z daniel920712 Parachute rings (IOI12_rings) C++14
37 / 100
 3424 ms 74900 KB 
#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <set>
using namespace std;
int N;
int who;
vector < int > Next[1000005],tt;
int deg[1000005];
bool have[1000005];
int ok=1;
int x=0,y=0;
set < int > xxx;
void Init(int N_)
{
    N = N_;
}

void Link(int A, int B)
{
    Next[A].push_back(B);
    Next[B].push_back(A);
    deg[A]++;
    deg[B]++;
}
void F(int here)
{
    y++;
    int t=0;
    have[here]=1;
    for(auto i:Next[here]) if(!have[i]&&i!=who) F(i);
}
int CountCritical()
{
    int ans=0,now=0;
    int i,j;
    tt.clear();
    xxx.clear();
    for(i=0;i<N;i++)
    {
        if(deg[i]>=3)
        {
            tt.push_back(i);
            now++;
        }
    }
    if(now==0)
    {
        x=y=0;
        ok=1;
        who=-1;
        for(j=0;j<N;j++) have[j]=0;
        for(j=0;j<N;j++)
        {
            if(deg[j]==0) have[j]=1;
            if(deg[j]==1&&!have[j]) F(j);
        }
        for(j=0;j<N;j++)
        {
            if(!have[j])
            {
                who=-1;
                x++;
                y=0;
                F(j);
            }
            ans+=x;
        }

        if(x==0) return N;
        if(x==1) return y;
        return 0;
    }
    else if(now==1)
    {
        //printf("bb %d\n",ans);
        for(auto i:tt)
        {
            ok=1;
            who=i;
            for(auto j:Next[i]) deg[j]--;
            for(j=0;j<N;j++) have[j]=0;
            have[i]=1;
            for(j=0;j<N;j++)
            {
                if(deg[j]==0) have[j]=1;
                if(deg[j]==1&&!have[j]) F(j);
                if(deg[j]>=3&&i!=j) ok=0;
            }
            for(j=0;j<N;j++) if(!have[j]) ok=0;
            for(auto j:Next[i]) deg[j]++;
            ans+=ok;
        }
        if(deg[tt[0]]==3)
        {
            for(auto i:Next[tt[0]])
            {
                ok=1;
                who=i;
                for(auto j:Next[i]) deg[j]--;
                for(j=0;j<N;j++) have[j]=0;
                have[i]=1;
                for(j=0;j<N;j++)
                {
                    if(deg[j]==0) have[j]=1;
                    if(deg[j]==1&&!have[j]) F(j);
                    if(deg[j]>=3&&i!=j) ok=0;
                }
                for(j=0;j<N;j++) if(!have[j]) ok=0;
                for(auto j:Next[i]) deg[j]++;
                ans+=ok;

            }
        }
        return ans;
    }
    else if(now==2)
    {
        for(auto i:tt)
        {
            ok=1;
            who=i;
            for(auto j:Next[i]) deg[j]--;
            for(j=0;j<N;j++) have[j]=0;
            have[i]=1;
            for(j=0;j<N;j++)
            {
                if(deg[j]==0) have[j]=1;
                if(deg[j]==1&&!have[j]) F(j);
                if(deg[j]>=3&&i!=j) ok=0;
            }
            for(j=0;j<N;j++) if(!have[j]) ok=0;
            for(auto j:Next[i]) deg[j]++;
            if(ok) xxx.insert(i);
        }

        if(deg[tt[0]]==3)
        {
            for(auto i:Next[tt[0]])
            {
                ok=1;
                who=i;
                for(auto j:Next[i]) deg[j]--;
                for(j=0;j<N;j++) have[j]=0;
                have[i]=1;
                for(j=0;j<N;j++)
                {
                    if(deg[j]==0) have[j]=1;
                    if(deg[j]==1&&!have[j]) F(j);
                    if(deg[j]>=3&&i!=j) ok=0;
                }
                for(j=0;j<N;j++) if(!have[j]) ok=0;
                for(auto j:Next[i]) deg[j]++;
                if(ok) xxx.insert(i);

            }
        }

        if(deg[tt[1]]==3)
        {
            for(auto i:Next[tt[1]])
            {
                ok=1;
                who=i;
                for(auto j:Next[i]) deg[j]--;
                for(j=0;j<N;j++) have[j]=0;
                have[i]=1;
                for(j=0;j<N;j++)
                {
                    if(deg[j]==0) have[j]=1;
                    if(deg[j]==1&&!have[j]) F(j);
                    if(deg[j]>=3&&i!=j) ok=0;
                }
                for(j=0;j<N;j++) if(!have[j]) ok=0;
                for(auto j:Next[i]) deg[j]++;
                if(ok) xxx.insert(i);

            }
        }
        return xxx.size();
    }
    else return 0;


}

Compilation message

rings.cpp: In function 'void F(int)':
rings.cpp:29:9: warning: unused variable 't' [-Wunused-variable]
   29 |     int t=0;
      |         ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 24064 KB Output is correct
2 Correct 24 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 21 ms 23788 KB Output is correct
5 Correct 23 ms 24044 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 20 ms 23916 KB Output is correct
8 Correct 26 ms 24044 KB Output is correct
9 Correct 20 ms 24044 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 661 ms 45312 KB Output is correct
2 Correct 1145 ms 53540 KB Output is correct
3 Correct 1026 ms 57828 KB Output is correct
4 Correct 1522 ms 60944 KB Output is correct
5 Correct 1343 ms 61224 KB Output is correct
6 Correct 1481 ms 74900 KB Output is correct
7 Correct 1094 ms 57308 KB Output is correct
8 Correct 3047 ms 58596 KB Output is correct
9 Correct 3424 ms 61120 KB Output is correct
10 Correct 1030 ms 66440 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 24064 KB Output is correct
2 Correct 24 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 21 ms 23788 KB Output is correct
5 Correct 23 ms 24044 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 20 ms 23916 KB Output is correct
8 Correct 26 ms 24044 KB Output is correct
9 Correct 20 ms 24044 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Incorrect 29 ms 24320 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 24064 KB Output is correct
2 Correct 24 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 21 ms 23788 KB Output is correct
5 Correct 23 ms 24044 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 20 ms 23916 KB Output is correct
8 Correct 26 ms 24044 KB Output is correct
9 Correct 20 ms 24044 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Incorrect 29 ms 24320 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 24064 KB Output is correct
2 Correct 24 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 21 ms 23788 KB Output is correct
5 Correct 23 ms 24044 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 20 ms 23916 KB Output is correct
8 Correct 26 ms 24044 KB Output is correct
9 Correct 20 ms 24044 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Correct 661 ms 45312 KB Output is correct
12 Correct 1145 ms 53540 KB Output is correct
13 Correct 1026 ms 57828 KB Output is correct
14 Correct 1522 ms 60944 KB Output is correct
15 Correct 1343 ms 61224 KB Output is correct
16 Correct 1481 ms 74900 KB Output is correct
17 Correct 1094 ms 57308 KB Output is correct
18 Correct 3047 ms 58596 KB Output is correct
19 Correct 3424 ms 61120 KB Output is correct
20 Correct 1030 ms 66440 KB Output is correct
21 Incorrect 29 ms 24320 KB Output isn't correct
22 Halted 0 ms 0 KB -