oj.uz

Submission #1035191

# Submission time Handle Problem Language Result Execution time Memory
1035191 2024-07-26T06:12:41 Z 12345678 Parachute rings (IOI12_rings) C++17
37 / 100
 959 ms 117896 KB 
#include <bits/stdc++.h>

using namespace std;

const int nx=1e6+5;

int n, vs[nx], sm[nx], rem[nx], cnt, res, lvl[nx], t;
vector<int> d[nx];

void dfs(int u, int p)
{
    vs[u]=1;
    lvl[u]=lvl[p]+1;
    for (auto v:d[u])
    {
        if (v==p) continue;
        if (!vs[v]) dfs(v, u);
        else if (lvl[v]<lvl[u]) sm[u]++, rem[v]++, cnt++;
    }
}

void dfs2(int u, int p)
{
    vs[u]=1;
    for (auto v:d[u]) if (v!=p&&!vs[v]) dfs2(v, u), sm[u]+=sm[v]-rem[v];
    if (sm[u]==cnt)
    {
        int f=0, tmp=d[u].size()>2;
        for (auto v:d[u]) 
        {
            if (d[v].size()>3) f=1;
            else if (d[v].size()==3) tmp++;
        }
        if (!f&&tmp==t) res++;
    }
}

void Init(int N_) {
    n=N_;
}

void Link(int A, int B) {
    d[A].push_back(B), d[B].push_back(A);
}

int CountCritical() {
    cnt=res=t=0;
    for (int i=0; i<n; i++) vs[i]=sm[i]=rem[i]=lvl[i]=0, t+=d[i].size()>2;
    for (int i=0; i<n; i++) if (!vs[i]) dfs(i, i);
    for (int i=0; i<n; i++) vs[i]=0;
    for (int i=0; i<n; i++) if (!vs[i]) dfs2(i, i);
    return res;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Correct 11 ms 24156 KB Output is correct
3 Correct 11 ms 24156 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24412 KB Output is correct
7 Correct 10 ms 23896 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 11 ms 24156 KB Output is correct
10 Correct 12 ms 24156 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 314 ms 53592 KB Output is correct
2 Correct 673 ms 70228 KB Output is correct
3 Correct 727 ms 94804 KB Output is correct
4 Correct 917 ms 82004 KB Output is correct
5 Correct 901 ms 82768 KB Output is correct
6 Correct 914 ms 117896 KB Output is correct
7 Correct 748 ms 93412 KB Output is correct
8 Correct 834 ms 79544 KB Output is correct
9 Correct 959 ms 84188 KB Output is correct
10 Correct 787 ms 86612 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Correct 11 ms 24156 KB Output is correct
3 Correct 11 ms 24156 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24412 KB Output is correct
7 Correct 10 ms 23896 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 11 ms 24156 KB Output is correct
10 Correct 12 ms 24156 KB Output is correct
11 Incorrect 17 ms 24156 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Correct 11 ms 24156 KB Output is correct
3 Correct 11 ms 24156 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24412 KB Output is correct
7 Correct 10 ms 23896 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 11 ms 24156 KB Output is correct
10 Correct 12 ms 24156 KB Output is correct
11 Incorrect 17 ms 24156 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Correct 11 ms 24156 KB Output is correct
3 Correct 11 ms 24156 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24412 KB Output is correct
7 Correct 10 ms 23896 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 11 ms 24156 KB Output is correct
10 Correct 12 ms 24156 KB Output is correct
11 Correct 314 ms 53592 KB Output is correct
12 Correct 673 ms 70228 KB Output is correct
13 Correct 727 ms 94804 KB Output is correct
14 Correct 917 ms 82004 KB Output is correct
15 Correct 901 ms 82768 KB Output is correct
16 Correct 914 ms 117896 KB Output is correct
17 Correct 748 ms 93412 KB Output is correct
18 Correct 834 ms 79544 KB Output is correct
19 Correct 959 ms 84188 KB Output is correct
20 Correct 787 ms 86612 KB Output is correct
21 Incorrect 17 ms 24156 KB Output isn't correct
22 Halted 0 ms 0 KB -