oj.uz

Submission #357248

# Submission time Handle Problem Language Result Execution time Memory
357248 2021-01-24T03:28:42 Z daniel920712 Parachute rings (IOI12_rings) C++14
37 / 100
 3549 ms 74220 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,z=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=i;
        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 18 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 18 ms 24044 KB Output is correct
4 Correct 17 ms 23788 KB Output is correct
5 Correct 20 ms 23916 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 17 ms 24044 KB Output is correct
9 Correct 24 ms 24192 KB Output is correct
10 Correct 19 ms 24044 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 600 ms 42732 KB Output is correct
2 Correct 1027 ms 53084 KB Output is correct
3 Correct 1179 ms 57228 KB Output is correct
4 Correct 1422 ms 60396 KB Output is correct
5 Correct 1281 ms 60520 KB Output is correct
6 Correct 1259 ms 74220 KB Output is correct
7 Correct 997 ms 56804 KB Output is correct
8 Correct 3133 ms 57880 KB Output is correct
9 Correct 3549 ms 60452 KB Output is correct
10 Correct 1337 ms 73456 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 18 ms 24044 KB Output is correct
4 Correct 17 ms 23788 KB Output is correct
5 Correct 20 ms 23916 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 17 ms 24044 KB Output is correct
9 Correct 24 ms 24192 KB Output is correct
10 Correct 19 ms 24044 KB Output is correct
11 Incorrect 36 ms 24192 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 18 ms 24044 KB Output is correct
4 Correct 17 ms 23788 KB Output is correct
5 Correct 20 ms 23916 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 17 ms 24044 KB Output is correct
9 Correct 24 ms 24192 KB Output is correct
10 Correct 19 ms 24044 KB Output is correct
11 Incorrect 36 ms 24192 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 18 ms 24044 KB Output is correct
4 Correct 17 ms 23788 KB Output is correct
5 Correct 20 ms 23916 KB Output is correct
6 Correct 20 ms 24172 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 17 ms 24044 KB Output is correct
9 Correct 24 ms 24192 KB Output is correct
10 Correct 19 ms 24044 KB Output is correct
11 Correct 600 ms 42732 KB Output is correct
12 Correct 1027 ms 53084 KB Output is correct
13 Correct 1179 ms 57228 KB Output is correct
14 Correct 1422 ms 60396 KB Output is correct
15 Correct 1281 ms 60520 KB Output is correct
16 Correct 1259 ms 74220 KB Output is correct
17 Correct 997 ms 56804 KB Output is correct
18 Correct 3133 ms 57880 KB Output is correct
19 Correct 3549 ms 60452 KB Output is correct
20 Correct 1337 ms 73456 KB Output is correct
21 Incorrect 36 ms 24192 KB Output isn't correct
22 Halted 0 ms 0 KB -