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답안 #926202

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
926202 2024-02-12T17:11:07 Z codefox 철인 이종 경기 (APIO18_duathlon) C++14
31 / 100
 106 ms 29952 KB 
#include<bits/stdc++.h>
    
using namespace std;
    
#define int ll    
#define ll long long
#define pii pair<int, int>
    
vector<vector<int>> graph;
vector<vector<int>> cgraph;
vector<vector<ll>> opt;
vector<int> comp;
vector<int> low;
vector<int> num;
vector<int> vis;
vector<int> art;
vector<ll> compsize;
stack<int> s;
int root = -1;
ll sol = 0;
int c = 0;
int d = 0;
ll n, m;
    
void dfs(int i, int p)
{
    num[i] = low[i] = ++c;
    s.push(i);
    for (int ele:graph[i])
    {
        if (ele == p) continue;
        if (!num[ele]) 
        {
            dfs(ele, i);
            if (low[ele]==num[i] && i != root)
            {
                while(s.top() != ele)
                {
                    comp[s.top()] = d;
                    compsize[d]++;
                    s.pop();
                }
                comp[ele] = d;
                compsize[d]++;
                s.pop();
                d++;
            }
        }
        low[i] = min(low[i], low[ele]);
    }
    if (num[i]==low[i])
    {
        art[d] = 1;
        while (s.top() != i)
        {
            comp[s.top()] = d;
            compsize[d]++;
            s.pop();
        }
        comp[i] = d;
        compsize[d]++;
        s.pop();
        d++;
    }
}
    
void dfs2(int i)
{
    vis[i] = 1;
    opt[i][0] = compsize[i];
    opt[i][1] = (compsize[i]-1)*(compsize[i]-2) +compsize[i]-1;
    if (!art[i]) opt[i][1] += compsize[i]-1;
 
    sol += (compsize[i]-2)*compsize[i]*(compsize[i]-1);
    if (!art[i]) sol += compsize[i]*(compsize[i]-1);
    vector<array<ll, 2>> ones;
    ll sum = 0;
    for (int ele:cgraph[i])
    {
        if (vis[ele]) continue;
        dfs2(ele);
        opt[i][0] += opt[ele][0];
        opt[i][1] += opt[ele][1] + opt[ele][0]*compsize[i];
        sum += opt[ele][0];
        ones.push_back({opt[ele][0], opt[ele][1]});
        sol += opt[ele][0]*(compsize[i]-1)*(compsize[i]-2)*2;
        sol += opt[ele][0]*(compsize[i]-1)*2;
        if (!art[i]) sol += opt[ele][0]*(compsize[i]-1)*2;
        sol += opt[ele][1]*compsize[i]*2;
    }
 
    for (array<ll, 2> ele:ones)
    {
        if (!art[i]) sol += ele[0]*(sum-ele[0])*(compsize[i]+1);
        else         sol += ele[0]*(sum-ele[0])*(compsize[i]);
        sol += ele[1]*(sum-ele[0])*2;
    }
}
    
int32_t main()
{
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    
    cin >> n >> m;
    graph.assign(n, vector<int>());
    cgraph.assign(n, vector<int>());
    compsize.assign(n, 0);
    low.assign(n, 0);
    num.assign(n, 0);
    comp.assign(n, -1);
    vis.assign(n, 0);
    art.assign(n, 0);
    opt.assign(n, vector<ll>(2, 0));

    vector<int> degree(n, 0);
    for (int i =0; i < m; i++)
    {
        int a, b;
        cin >> a >> b;
        a--; b--;
        graph[a].push_back(b);
        graph[b].push_back(a);
        degree[a]++;
        degree[b]++;
    }
    
    for (int i =0; i < n; i++)
    {
        if (!num[i]) 
        {
            root = i;
            dfs(i, -1);
        }
    }
    
    for (int i = 0; i <n; i++)
    {
        for (int ele:graph[i])
        {
            if (comp[i] == comp[ele]) continue;
            cgraph[comp[i]].push_back(comp[ele]);
        }
    }
    
    for (int i = 0; i< n; i++)
    {
        if (!vis[comp[i]])
        {
            dfs2(comp[i]);
        }
    }

    cout << sol << "\n";
    
    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Incorrect 0 ms 348 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Incorrect 0 ms 348 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 27728 KB Output is correct
2 Correct 89 ms 27940 KB Output is correct
3 Correct 84 ms 26568 KB Output is correct
4 Correct 74 ms 25684 KB Output is correct
5 Correct 100 ms 23892 KB Output is correct
6 Correct 95 ms 25408 KB Output is correct
7 Correct 86 ms 23792 KB Output is correct
8 Correct 81 ms 24168 KB Output is correct
9 Correct 85 ms 22352 KB Output is correct
10 Correct 89 ms 22528 KB Output is correct
11 Correct 68 ms 20808 KB Output is correct
12 Correct 68 ms 20584 KB Output is correct
13 Correct 81 ms 20644 KB Output is correct
14 Correct 62 ms 20496 KB Output is correct
15 Correct 52 ms 20304 KB Output is correct
16 Correct 53 ms 20052 KB Output is correct
17 Correct 12 ms 15964 KB Output is correct
18 Correct 12 ms 15964 KB Output is correct
19 Correct 11 ms 15964 KB Output is correct
20 Correct 11 ms 15964 KB Output is correct
21 Correct 11 ms 16116 KB Output is correct
22 Correct 13 ms 15964 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 856 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct

Subtask #5
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 87 ms 23520 KB Output is correct
2 Correct 104 ms 23592 KB Output is correct
3 Correct 106 ms 23448 KB Output is correct
4 Correct 84 ms 23376 KB Output is correct
5 Correct 87 ms 23408 KB Output is correct
6 Correct 94 ms 29952 KB Output is correct
7 Correct 105 ms 28552 KB Output is correct
8 Correct 93 ms 27472 KB Output is correct
9 Correct 94 ms 25952 KB Output is correct
10 Correct 91 ms 23584 KB Output is correct
11 Correct 86 ms 23460 KB Output is correct
12 Correct 86 ms 23460 KB Output is correct
13 Correct 96 ms 23584 KB Output is correct
14 Correct 80 ms 23124 KB Output is correct
15 Correct 71 ms 22612 KB Output is correct
16 Correct 61 ms 20816 KB Output is correct
17 Correct 75 ms 26096 KB Output is correct
18 Correct 74 ms 26048 KB Output is correct
19 Correct 78 ms 25788 KB Output is correct
20 Correct 76 ms 25320 KB Output is correct

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Incorrect 1 ms 604 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 23376 KB Output is correct
2 Correct 93 ms 23336 KB Output is correct
3 Incorrect 101 ms 23084 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Incorrect 0 ms 348 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Incorrect 0 ms 348 KB Output isn't correct
8 Halted 0 ms 0 KB -