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Submission #1035199

# Submission time Handle Problem Language Result Execution time Memory
1035199 2024-07-26T06:20:45 Z 12345678 Parachute rings (IOI12_rings) C++17
37 / 100
 1117 ms 114260 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, mx, cntt;
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;
        if (cntt>1) return;
        if (cntt==1&&d[u].size()<=3) return;
        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=mx=cntt=0;
    for (int i=0; i<n; i++) vs[i]=sm[i]=rem[i]=lvl[i]=0, t+=d[i].size()>2, mx=max(mx, (int)d[i].size()), cntt+=d[i].size()>3;
    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 12 ms 24156 KB Output is correct
3 Correct 16 ms 24192 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 24224 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 11 ms 23896 KB Output is correct
8 Correct 12 ms 24156 KB Output is correct
9 Correct 14 ms 24228 KB Output is correct
10 Correct 13 ms 24228 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 428 ms 51784 KB Output is correct
2 Correct 796 ms 67436 KB Output is correct
3 Correct 918 ms 91528 KB Output is correct
4 Correct 1061 ms 78348 KB Output is correct
5 Correct 1105 ms 79300 KB Output is correct
6 Correct 1099 ms 114260 KB Output is correct
7 Correct 869 ms 88984 KB Output is correct
8 Correct 1022 ms 74732 KB Output is correct
9 Correct 1117 ms 78704 KB Output is correct
10 Correct 852 ms 81972 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 12 ms 24156 KB Output is correct
3 Correct 16 ms 24192 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 24224 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 11 ms 23896 KB Output is correct
8 Correct 12 ms 24156 KB Output is correct
9 Correct 14 ms 24228 KB Output is correct
10 Correct 13 ms 24228 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 12 ms 24156 KB Output is correct
3 Correct 16 ms 24192 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 24224 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 11 ms 23896 KB Output is correct
8 Correct 12 ms 24156 KB Output is correct
9 Correct 14 ms 24228 KB Output is correct
10 Correct 13 ms 24228 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 12 ms 24156 KB Output is correct
3 Correct 16 ms 24192 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 24224 KB Output is correct
6 Correct 17 ms 24448 KB Output is correct
7 Correct 11 ms 23896 KB Output is correct
8 Correct 12 ms 24156 KB Output is correct
9 Correct 14 ms 24228 KB Output is correct
10 Correct 13 ms 24228 KB Output is correct
11 Correct 428 ms 51784 KB Output is correct
12 Correct 796 ms 67436 KB Output is correct
13 Correct 918 ms 91528 KB Output is correct
14 Correct 1061 ms 78348 KB Output is correct
15 Correct 1105 ms 79300 KB Output is correct
16 Correct 1099 ms 114260 KB Output is correct
17 Correct 869 ms 88984 KB Output is correct
18 Correct 1022 ms 74732 KB Output is correct
19 Correct 1117 ms 78704 KB Output is correct
20 Correct 852 ms 81972 KB Output is correct
21 Incorrect 17 ms 24156 KB Output isn't correct
22 Halted 0 ms 0 KB -