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Submission #980790

# Submission time Handle Problem Language Result Execution time Memory
980790 2024-05-12T12:08:25 Z Unforgettablepl Duathlon (APIO18_duathlon) C++17
8 / 100
 41 ms 19292 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

vector<int> adj[200001];
bool visited[200001];
int DP[200001][4];
bool isCycle;
int tot;

void dfs(int x,int p){
    if(visited[x]){
        isCycle=true;
        return;
    }
    tot++;
    visited[x]=true;
    for(int&i:adj[x])if(i!=p)dfs(i,x);
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    for(auto&i:DP)i[0]=1;
    for(int i=1;i<=200000;i++)for(int j=1;j<=3;j++)DP[i][j]=DP[i-1][j]+DP[i-1][j-1];
    int n,m;
    cin >> n >> m;
    for(int i=1;i<=m;i++){
        int a,b;cin>>a>>b;
        adj[a].emplace_back(b);
        adj[b].emplace_back(a);
    }
    int ans = 0;
    for(int i=1;i<=n;i++)if(!visited[i]){
        isCycle = false;
        tot = 0;
        dfs(i,0);
        if(isCycle)ans+=tot*(tot-1ll)*(tot-2ll);
        else ans+=2ll*DP[tot][3];
    }
    cout << ans << '\n';
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 3 ms 11356 KB Output is correct
4 Correct 3 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Incorrect 3 ms 11356 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 3 ms 11356 KB Output is correct
4 Correct 3 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Incorrect 3 ms 11356 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 19292 KB Output is correct
2 Correct 29 ms 19284 KB Output is correct
3 Correct 29 ms 16816 KB Output is correct
4 Correct 41 ms 19284 KB Output is correct
5 Correct 30 ms 17500 KB Output is correct
6 Correct 36 ms 17492 KB Output is correct
7 Correct 29 ms 16716 KB Output is correct
8 Correct 30 ms 17236 KB Output is correct
9 Correct 29 ms 16208 KB Output is correct
10 Correct 29 ms 16720 KB Output is correct
11 Correct 25 ms 15700 KB Output is correct
12 Correct 26 ms 15452 KB Output is correct
13 Correct 23 ms 15452 KB Output is correct
14 Correct 25 ms 15232 KB Output is correct
15 Correct 18 ms 14680 KB Output is correct
16 Correct 18 ms 14688 KB Output is correct
17 Correct 3 ms 11612 KB Output is correct
18 Correct 3 ms 11820 KB Output is correct
19 Correct 4 ms 11612 KB Output is correct
20 Correct 3 ms 11612 KB Output is correct
21 Correct 3 ms 11612 KB Output is correct
22 Correct 3 ms 11612 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 11612 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 15184 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 11608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 15128 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 3 ms 11356 KB Output is correct
4 Correct 3 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Incorrect 3 ms 11356 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 11356 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 3 ms 11356 KB Output is correct
4 Correct 3 ms 11356 KB Output is correct
5 Correct 3 ms 11356 KB Output is correct
6 Correct 3 ms 11356 KB Output is correct
7 Incorrect 3 ms 11356 KB Output isn't correct
8 Halted 0 ms 0 KB -