Submission #404106

#	Time	Username	Problem	Language	Result	Execution time	Memory
404106		gevacrt	Duathlon (APIO18_duathlon)	C++17	0 / 100	129 ms	30844 KiB

count_triplets

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

typedef vector<int> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;

#define INF INT_MAX
#define MOD 1000000007
#define all(x) x.begin(), x.end()

vvi adj;

namespace BCC {
    vi tin, low; int timer, pp;
    vvi G; vii edges;

    void dfs(int u, int p){
        tin[u] = low[u] = timer++;
        int child = 0;

        for(auto v : adj[u]){
            if(v == p) continue;
            edges.push_back({u, v});

            if(tin[v]) low[u] = min(low[u], tin[v]);
            else{
                dfs(v, p); low[u] = min(low[u], low[v]);
                if((p == -1 and child > 0) or (low[v] >= tin[u] and p != -1)){
                    while(true){
                        auto [a, b] = edges.back(); edges.pop_back();
                        G[pp].push_back(a); G[a].push_back(pp);
                        G[pp].push_back(b); G[b].push_back(pp);
                        if(a == u and b == v) break;
                    }
                    pp++;
                }
                child++;
            }
        }
    }

    void init(int N){
        tin.resize(N), low.resize(N);
        pp = N; G.resize(2*N+10); dfs(0, -1);
    
        while(!edges.empty()){
            auto [a, b] = edges.back(); edges.pop_back();
            G[a].push_back(pp); G[pp].push_back(a);
            G[b].push_back(pp); G[pp].push_back(b);
        }

        for(auto &vec : G){
            sort(all(vec));
            vec.erase(unique(all(vec)), vec.end());
        }
    }
};

vi sz; int N, ANS = 0;

int comp_sz(int u, int p, auto &G){

}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    int M; cin >> N >> M;
    adj.resize(N);

    while(M--){
        int u, v; cin >> u >> v;
        u--, v--;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    BCC::init(N);

    return 0;
}

Compilation message (stderr)

count_triplets.cpp:68:27: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   68 | int comp_sz(int u, int p, auto &G){
      |                           ^~~~
count_triplets.cpp: In function 'int comp_sz(int, int, auto:23&)':
count_triplets.cpp:70:1: warning: no return statement in function returning non-void [-Wreturn-type]
   70 | }
      | ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 8
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 15
• Subtask 7: 0 / 20
• Subtask 8: 0 / 8
• Subtask 9: 0 / 10