oj.uz

Submission #350325

# Submission time Handle Problem Language Result Execution time Memory
350325 2021-01-19T05:02:09 Z juggernaut Parachute rings (IOI12_rings) C++14
55 / 100
 4000 ms 74188 KB 
#include<bits/stdc++.h>
using namespace std;
vector<int>g[1000005];
bool on[1000005],vis[1000005];
int n,deg[1000005],linker;
bool dfs(int v,int p){
    bool flag=false;
    vis[v]=true;
    for(int to:g[v])if(to!=p){
        if(on[to])continue;
        if(flag)return false;
        if(vis[to])return false;
        if(!dfs(to,v))return false;
        flag=true;
    }
    return true;
}
void dfs2(int v){
    linker++;
    vis[v]=1;
    for(int to:g[v])if(!vis[to])dfs2(to);
}
bool check(){
    for(int i=0;i<n;i++)vis[i]=0;
    for(int i=0;i<n;i++)if(!on[i]&&!vis[i]&&deg[i]<2)if(!dfs(i,i))return false;
    for(int i=0;i<n;i++)if(!vis[i]&&!on[i])return false;
    return true;
}
void Init(int N){n=N;}
void Link(int x,int y){
    g[x].push_back(y);
    g[y].push_back(x);
    deg[x]++;
    deg[y]++;
}
int CountCritical(){
    int mx=-1,cnt=0;
    for(int i=0;i<n;i++)
        if(deg[i]>mx){
            mx=deg[i];
            cnt=1;
        }else if(deg[i]==mx)cnt++;
    if(mx>=3){
        if(cnt!=1&&mx!=3)return 0;
        cnt=0;
        for(int i=0;i<n;i++){
            if(deg[i]==mx){
                on[i]=true;
                for(auto to:g[i])deg[to]--;
                cnt+=check();
                for(auto to:g[i])deg[to]++;
                on[i]=false;
                if(mx==3)for(int to:g[i]){
                    on[to]=true;
                    for(auto to2:g[to])deg[to2]--;
                    cnt+=check();
                    for(auto to2:g[to])deg[to2]++;
                    on[to]=false;
                }
                return cnt;
            }
        }
    }else if(mx<2)return n;
    else if(mx==2){
        for(int i=0;i<n;i++)vis[i]=0;
        for(int i=0;i<n;i++)if(!vis[i]&&deg[i]<2)dfs(i,i);
        bool flag=false;
        for(int i=0;i<n;i++)if(!vis[i]){
            if(flag)return 0;
            linker=0;
            dfs2(i);
            flag=true;
        }
        if(flag)return linker;
        return n;
    }
}

Compilation message

rings.cpp: In function 'int CountCritical()':
rings.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type]
   77 | }
      | ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 17 ms 23916 KB Output is correct
5 Correct 18 ms 24044 KB Output is correct
6 Correct 18 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 18 ms 24044 KB Output is correct
9 Correct 19 ms 24172 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 543 ms 42860 KB Output is correct
2 Correct 990 ms 53100 KB Output is correct
3 Correct 939 ms 55020 KB Output is correct
4 Correct 1251 ms 60812 KB Output is correct
5 Correct 1261 ms 60672 KB Output is correct
6 Correct 1241 ms 74188 KB Output is correct
7 Correct 900 ms 55532 KB Output is correct
8 Correct 1646 ms 58588 KB Output is correct
9 Correct 1269 ms 60908 KB Output is correct
10 Correct 696 ms 60140 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 17 ms 23916 KB Output is correct
5 Correct 18 ms 24044 KB Output is correct
6 Correct 18 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 18 ms 24044 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Correct 31 ms 24044 KB Output is correct
12 Correct 45 ms 24300 KB Output is correct
13 Correct 60 ms 24300 KB Output is correct
14 Correct 34 ms 24044 KB Output is correct
15 Correct 44 ms 24044 KB Output is correct
16 Correct 40 ms 24304 KB Output is correct
17 Correct 27 ms 24300 KB Output is correct
18 Correct 26 ms 24428 KB Output is correct
19 Correct 46 ms 24300 KB Output is correct
20 Correct 58 ms 24300 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 17 ms 23916 KB Output is correct
5 Correct 18 ms 24044 KB Output is correct
6 Correct 18 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 18 ms 24044 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Correct 31 ms 24044 KB Output is correct
12 Correct 45 ms 24300 KB Output is correct
13 Correct 60 ms 24300 KB Output is correct
14 Correct 34 ms 24044 KB Output is correct
15 Correct 44 ms 24044 KB Output is correct
16 Correct 40 ms 24304 KB Output is correct
17 Correct 27 ms 24300 KB Output is correct
18 Correct 26 ms 24428 KB Output is correct
19 Correct 46 ms 24300 KB Output is correct
20 Correct 58 ms 24300 KB Output is correct
21 Execution timed out 4099 ms 24472 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23788 KB Output is correct
2 Correct 20 ms 24044 KB Output is correct
3 Correct 21 ms 24044 KB Output is correct
4 Correct 17 ms 23916 KB Output is correct
5 Correct 18 ms 24044 KB Output is correct
6 Correct 18 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 18 ms 24044 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 21 ms 24044 KB Output is correct
11 Correct 543 ms 42860 KB Output is correct
12 Correct 990 ms 53100 KB Output is correct
13 Correct 939 ms 55020 KB Output is correct
14 Correct 1251 ms 60812 KB Output is correct
15 Correct 1261 ms 60672 KB Output is correct
16 Correct 1241 ms 74188 KB Output is correct
17 Correct 900 ms 55532 KB Output is correct
18 Correct 1646 ms 58588 KB Output is correct
19 Correct 1269 ms 60908 KB Output is correct
20 Correct 696 ms 60140 KB Output is correct
21 Correct 31 ms 24044 KB Output is correct
22 Correct 45 ms 24300 KB Output is correct
23 Correct 60 ms 24300 KB Output is correct
24 Correct 34 ms 24044 KB Output is correct
25 Correct 44 ms 24044 KB Output is correct
26 Correct 40 ms 24304 KB Output is correct
27 Correct 27 ms 24300 KB Output is correct
28 Correct 26 ms 24428 KB Output is correct
29 Correct 46 ms 24300 KB Output is correct
30 Correct 58 ms 24300 KB Output is correct
31 Execution timed out 4099 ms 24472 KB Time limit exceeded
32 Halted 0 ms 0 KB -