oj.uz

Submission #350181

# Submission time Handle Problem Language Result Execution time Memory
350181 2021-01-19T04:05:00 Z juggernaut Parachute rings (IOI12_rings) C++14
55 / 100
 4000 ms 87384 KB 
#ifndef EVAL
#include"grader.cpp"
#endif
#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>=4){
        if(cnt!=1)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;
            }
        }
        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;
    }else if(mx==3){
        for(int i=0;i<n;i++){
            cnt=0;
            if(mx==deg[i]){
                on[i]=true;
                for(auto to:g[i])deg[to]--;
                cnt+=check();
                for(auto to:g[i])deg[to]++;
                on[i]=false;
                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;
            }
        }
    }
}
/*
7 13
-1
1 2
-1
0 5
-1
2 0
-1
3 2
-1
3 5
-1
4 3
-1

*/

Compilation message

rings.cpp: In function 'int CountCritical()':
rings.cpp:92:1: warning: control reaches end of non-void function [-Wreturn-type]
   92 | }
      | ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23788 KB Output is correct
2 Correct 18 ms 24172 KB Output is correct
3 Correct 18 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 19 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 20 ms 24172 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 19 ms 24172 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 571 ms 42792 KB Output is correct
2 Correct 999 ms 53228 KB Output is correct
3 Correct 950 ms 55160 KB Output is correct
4 Correct 1297 ms 60512 KB Output is correct
5 Correct 1285 ms 74160 KB Output is correct
6 Correct 1280 ms 87384 KB Output is correct
7 Correct 887 ms 67692 KB Output is correct
8 Correct 1652 ms 70764 KB Output is correct
9 Correct 1294 ms 74708 KB Output is correct
10 Correct 714 ms 72744 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23788 KB Output is correct
2 Correct 18 ms 24172 KB Output is correct
3 Correct 18 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 19 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 20 ms 24172 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 19 ms 24172 KB Output is correct
11 Correct 34 ms 24172 KB Output is correct
12 Correct 47 ms 24428 KB Output is correct
13 Correct 65 ms 24380 KB Output is correct
14 Correct 38 ms 24300 KB Output is correct
15 Correct 58 ms 24172 KB Output is correct
16 Correct 41 ms 24300 KB Output is correct
17 Correct 30 ms 24300 KB Output is correct
18 Correct 32 ms 24428 KB Output is correct
19 Correct 47 ms 24340 KB Output is correct
20 Correct 67 ms 24428 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23788 KB Output is correct
2 Correct 18 ms 24172 KB Output is correct
3 Correct 18 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 19 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 20 ms 24172 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 19 ms 24172 KB Output is correct
11 Correct 34 ms 24172 KB Output is correct
12 Correct 47 ms 24428 KB Output is correct
13 Correct 65 ms 24380 KB Output is correct
14 Correct 38 ms 24300 KB Output is correct
15 Correct 58 ms 24172 KB Output is correct
16 Correct 41 ms 24300 KB Output is correct
17 Correct 30 ms 24300 KB Output is correct
18 Correct 32 ms 24428 KB Output is correct
19 Correct 47 ms 24340 KB Output is correct
20 Correct 67 ms 24428 KB Output is correct
21 Execution timed out 4049 ms 24708 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23788 KB Output is correct
2 Correct 18 ms 24172 KB Output is correct
3 Correct 18 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 19 ms 24172 KB Output is correct
7 Correct 17 ms 23916 KB Output is correct
8 Correct 20 ms 24172 KB Output is correct
9 Correct 19 ms 24172 KB Output is correct
10 Correct 19 ms 24172 KB Output is correct
11 Correct 571 ms 42792 KB Output is correct
12 Correct 999 ms 53228 KB Output is correct
13 Correct 950 ms 55160 KB Output is correct
14 Correct 1297 ms 60512 KB Output is correct
15 Correct 1285 ms 74160 KB Output is correct
16 Correct 1280 ms 87384 KB Output is correct
17 Correct 887 ms 67692 KB Output is correct
18 Correct 1652 ms 70764 KB Output is correct
19 Correct 1294 ms 74708 KB Output is correct
20 Correct 714 ms 72744 KB Output is correct
21 Correct 34 ms 24172 KB Output is correct
22 Correct 47 ms 24428 KB Output is correct
23 Correct 65 ms 24380 KB Output is correct
24 Correct 38 ms 24300 KB Output is correct
25 Correct 58 ms 24172 KB Output is correct
26 Correct 41 ms 24300 KB Output is correct
27 Correct 30 ms 24300 KB Output is correct
28 Correct 32 ms 24428 KB Output is correct
29 Correct 47 ms 24340 KB Output is correct
30 Correct 67 ms 24428 KB Output is correct
31 Execution timed out 4049 ms 24708 KB Time limit exceeded
32 Halted 0 ms 0 KB -