oj.uz

답안 #924447

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
924447 2024-02-09T04:04:26 Z Muhammad_Aneeq Political Development (BOI17_politicaldevelopment) C++17
4 / 100
 304 ms 2072 KB 
/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/

#include <iostream>
#include <vector>
#include <set>
using namespace std;
int const N=6e4+10;
vector<int>nei[N]={};
int res[N]={};
bool vis[N]={};
vector<int>f;
int n,k,ans=0;;
void dfs(int n)
{
    if (f.size()==k)
        return;
    vis[n]=1;
    f.push_back(n);
    for (auto j:nei[n])
        res[j]++;
    if (f.size()==k)
    {
        ans=max(ans,k);
         for (auto j:nei[n])
            res[j]--;
        f.pop_back();
        vis[n]=0;
        return ;
    }
    for (auto i:f)
    {
        if (res[i]!=f.size()-1)
        {
            for (auto j:nei[n])
                res[j]--;
            f.pop_back();
            vis[n]=0;
            return;
        }
    }
    for (auto j:nei[n])
    {
        if (!vis[j])
            dfs(j);
    }
    ans=max(ans,int(f.size()));
    for (auto j:nei[n])
        res[j]--;
    f.pop_back();
    vis[n]=0;
}
inline void solve()
{
    cin>>n>>k;
    for (int i=0;i<n;i++)
    {
        int d;
        cin>>d;
        while (d--)
        {
            int x;
            cin>>x;
            if (i!=x)
                nei[i].push_back(x);
        }
    }
    for (int i=1;i<=n;i++)
    {
        for (int j=1;j<=n;j++)
            vis[i]=0;
        dfs(i);
    }
    cout<<min(ans,k)<<endl;
}
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

Compilation message

politicaldevelopment.cpp: In function 'void dfs(int)':
politicaldevelopment.cpp:19:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |     if (f.size()==k)
      |         ~~~~~~~~^~~
politicaldevelopment.cpp:25:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     if (f.size()==k)
      |         ~~~~~~~~^~~
politicaldevelopment.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         if (res[i]!=f.size()-1)
      |             ~~~~~~^~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 25 ms 2072 KB Output is correct
5 Correct 25 ms 1884 KB Output is correct
6 Correct 3 ms 1884 KB Output is correct
7 Correct 3 ms 1884 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1628 KB Output is correct
10 Correct 1 ms 1880 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 25 ms 2072 KB Output is correct
5 Correct 25 ms 1884 KB Output is correct
6 Correct 3 ms 1884 KB Output is correct
7 Correct 3 ms 1884 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1628 KB Output is correct
10 Correct 1 ms 1880 KB Output is correct
11 Correct 32 ms 2072 KB Output is correct
12 Incorrect 304 ms 2052 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Incorrect 1 ms 1628 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 25 ms 2072 KB Output is correct
5 Correct 25 ms 1884 KB Output is correct
6 Correct 3 ms 1884 KB Output is correct
7 Correct 3 ms 1884 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1628 KB Output is correct
10 Correct 1 ms 1880 KB Output is correct
11 Correct 32 ms 2072 KB Output is correct
12 Incorrect 304 ms 2052 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1628 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 25 ms 2072 KB Output is correct
5 Correct 25 ms 1884 KB Output is correct
6 Correct 3 ms 1884 KB Output is correct
7 Correct 3 ms 1884 KB Output is correct
8 Correct 1 ms 1628 KB Output is correct
9 Correct 1 ms 1628 KB Output is correct
10 Correct 1 ms 1880 KB Output is correct
11 Correct 32 ms 2072 KB Output is correct
12 Incorrect 304 ms 2052 KB Output isn't correct
13 Halted 0 ms 0 KB -