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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#645696#7860. Graph of Maximum Degree 3CanShangyaWA 0ms3596kbC++142.8kb2024-10-16 19:31:102024-10-16 19:31:10

Judging History

你现在查看的是最新测评结果

  • [2024-10-16 19:31:10]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3596kb
  • [2024-10-16 19:31:10]
  • 提交

answer

#include <bits/stdc++.h>
#define int long long
using namespace std;
typedef long long ll;
struct DSU{
    vector<int>fa;
    DSU(int n)
    {
        for(int i = 0; i <= n; i++)
            fa.push_back(i);
    }
    int found(int x)
    {
        return fa[x] == x ? x : (fa[x] = found(fa[x]));
    }
    void merge(int x, int y)
    {
        x = found(x), y = found(y);
        if(x < y){swap(x, y);};
        if(x != y)
        {
            fa[x] = y;
        }
    }
};
void solve()
{
    int n, m;
    cin >> n >> m;
    vector<vector<int> >g1(n+10);
    vector<vector<int> >g2(n+10);
    DSU dsu1(n+1);
    DSU dsu2(n+1);
    for(int i = 0; i < m; i++)
    {
        int a, b, col;
        cin >> a >> b >> col;
        if(col == 0)
        {
            g1[a].push_back(b);
            g1[b].push_back(a);
            dsu1.merge(a,b);
        }
        else
        {
            g2[a].push_back(b);
            g2[b].push_back(a);
            dsu2.merge(a,b);
        }
    }
    vector<int>vis(n+10);
    vector<int>pend;
    int ans = 0;
    map<vector<int>, int>mp;
    auto dfs = [&](auto &&dfs, int now)
    {
        int cnt = pend.size();
        if(cnt > 4)
        {
            return;
        }
        // for(int i = 0; i < cnt; i++)
        // {
        //     cout << pend[i] << ' ';
        // }cout << '\n';
        bool op = true;
        int num = 0;
        if(cnt != 1)
        {
            vector<int> x(cnt+10);
            for(int i = 0; i < cnt; i ++)
            {
                for(int k = i; k < cnt; k++)
                {
                    for(auto j : g2[pend[i]])
                    {
                        if(j == pend[k])
                        {
                            x[i] = 1;
                            x[k] = 1;
                            break;
                        }
                    }
                }
            }
            for(int i = 0; i < cnt; i++)
            {
                if(!x[i])
                    op = false;
            }
        }
        
        if(op)
        {
            ans++;
            
        }
        for(auto i : g1[now])
        {
            if(!vis[i])
            {
                vis[i] = 1;
                pend.push_back(i);
                dfs(dfs, i);
                vis[i] = 0;
            }   
        } 
        while(pend.size() > 4)
        {
            pend.pop_back();
        }
    };
    for(int i = 1; i <= n; i++)
    {
        vis[i] = 1;
        pend.push_back(i);
        dfs(dfs, i);
        pend.clear();
        // pend.pop_back();
        
    }
    cout << ans << '\n';
}
signed main()
{
    cin.tie(0);cout.tie(0);ios::sync_with_stdio(0);
    // int _;
    // cin >> _;
    // while(_--)
    {
        solve();
    }
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3596kb

input:

3 4
1 2 0
1 3 1
2 3 0
2 3 1

output:

5

result:

ok 1 number(s): "5"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3596kb

input:

4 6
1 2 0
2 3 0
3 4 0
1 4 1
2 4 1
1 3 1

output:

5

result:

ok 1 number(s): "5"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3484kb

input:

20 28
9 6 1
9 6 0
3 8 0
8 4 0
3 8 1
3 4 1
2 13 0
13 1 0
19 1 0
2 1 1
2 19 1
13 19 1
14 15 1
14 15 0
7 12 0
12 17 0
20 17 0
7 17 1
7 20 1
12 20 1
16 18 0
18 10 0
5 10 0
16 10 1
16 5 1
18 5 1
4 6 0
9 11 0

output:

27

result:

ok 1 number(s): "27"

Test #4:

score: -100
Wrong Answer
time: 0ms
memory: 3548kb

input:

100 150
93 23 0
23 81 0
76 81 0
93 81 1
93 76 1
23 76 1
100 65 0
65 56 0
19 56 0
100 56 1
100 19 1
65 19 1
2 98 0
2 98 1
26 63 0
63 90 0
26 63 1
26 90 1
6 11 0
11 67 0
6 11 1
6 67 1
37 89 0
89 64 0
25 64 0
37 64 1
37 25 1
89 25 1
84 10 0
10 29 0
75 29 0
84 29 1
84 75 1
10 75 1
7 70 1
7 70 0
28 92 0
...

output:

145

result:

wrong answer 1st numbers differ - expected: '141', found: '145'