Submission #981467

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
981467	2024-05-13 08:51:26	phoenix0423	철인 이종 경기 (APIO18_duathlon)	C++17	71 / 100	97 ms	32788 KiB

count_triplets

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#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define fastio ios::sync_with_stdio(false), cin.tie(0)
#define pb push_back
#define eb emplace_back
#define f first
#define s second
#define int long long
const int maxn = 2e5 + 5;
vector<int> adj[maxn], nadj[maxn];
int in[maxn], low[maxn], sq[maxn], sz[maxn], dfn = 0, cnt = 0;
int n, m, ans = 0;
stack<int> st;
void dfs(int pos){
    // cout<<"dfs : "<<pos<<"\n";
    in[pos] = low[pos] = ++dfn;
    st.push(pos);
    for(auto x : adj[pos]){
        if(in[x]) low[pos] = min(low[pos], in[x]);
        else{
            dfs(x);
            low[pos] = min(low[pos], low[x]);
            if(low[x] >= in[pos]){
                int cur = n++;
                sq[cur] = 1, in[cur] = 1;
                while(low[st.top()] >= in[pos]){
                    if(st.top() == pos) break;
 
 
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Compilation message (stderr)

count_triplets.cpp: In function 'void dfs(long long int)':
count_triplets.cpp:37:21: warning: unused variable 'sz' [-Wunused-variable]
   37 |                 int sz = nadj[cur].size();
      |                     ^~

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