oj.uz

Submission #1035189

# Submission time Handle Problem Language Result Execution time Memory
1035189 2024-07-26T06:11:24 Z 12345678 Parachute rings (IOI12_rings) C++17
37 / 100
 998 ms 120980 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]=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 11 ms 23896 KB Output is correct
2 Correct 11 ms 24152 KB Output is correct
3 Correct 14 ms 24152 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 15 ms 24156 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 10 ms 23900 KB Output is correct
8 Correct 11 ms 24156 KB Output is correct
9 Correct 11 ms 24244 KB Output is correct
10 Correct 11 ms 24136 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 350 ms 55452 KB Output is correct
2 Correct 676 ms 72528 KB Output is correct
3 Correct 787 ms 97500 KB Output is correct
4 Correct 933 ms 84820 KB Output is correct
5 Correct 925 ms 85800 KB Output is correct
6 Correct 964 ms 120980 KB Output is correct
7 Correct 707 ms 94548 KB Output is correct
8 Correct 858 ms 80468 KB Output is correct
9 Correct 998 ms 85288 KB Output is correct
10 Correct 712 ms 87892 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 23896 KB Output is correct
2 Correct 11 ms 24152 KB Output is correct
3 Correct 14 ms 24152 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 15 ms 24156 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 10 ms 23900 KB Output is correct
8 Correct 11 ms 24156 KB Output is correct
9 Correct 11 ms 24244 KB Output is correct
10 Correct 11 ms 24136 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 11 ms 23896 KB Output is correct
2 Correct 11 ms 24152 KB Output is correct
3 Correct 14 ms 24152 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 15 ms 24156 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 10 ms 23900 KB Output is correct
8 Correct 11 ms 24156 KB Output is correct
9 Correct 11 ms 24244 KB Output is correct
10 Correct 11 ms 24136 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 11 ms 23896 KB Output is correct
2 Correct 11 ms 24152 KB Output is correct
3 Correct 14 ms 24152 KB Output is correct
4 Correct 10 ms 23900 KB Output is correct
5 Correct 15 ms 24156 KB Output is correct
6 Correct 14 ms 24412 KB Output is correct
7 Correct 10 ms 23900 KB Output is correct
8 Correct 11 ms 24156 KB Output is correct
9 Correct 11 ms 24244 KB Output is correct
10 Correct 11 ms 24136 KB Output is correct
11 Correct 350 ms 55452 KB Output is correct
12 Correct 676 ms 72528 KB Output is correct
13 Correct 787 ms 97500 KB Output is correct
14 Correct 933 ms 84820 KB Output is correct
15 Correct 925 ms 85800 KB Output is correct
16 Correct 964 ms 120980 KB Output is correct
17 Correct 707 ms 94548 KB Output is correct
18 Correct 858 ms 80468 KB Output is correct
19 Correct 998 ms 85288 KB Output is correct
20 Correct 712 ms 87892 KB Output is correct
21 Incorrect 17 ms 24156 KB Output isn't correct
22 Halted 0 ms 0 KB -