Submission #108445

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
108445	2019-04-29 16:02:05	PeppaPig	Duathlon (APIO18_duathlon)	C++14	82 / 100	799 ms	31064 KiB

count_triplets

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#include <bits/stdc++.h>
#define long long long
#define pii pair<int, int>
#define x first
#define y second
using namespace std;
const int N = 3e5+5;
int n, m;
int pre[N], low[N], ap[N], id[N];
vector<vector<int> > g(N), bcc;
vector<int> sz;
void tarjan(int u, int p) {
    static int idx = 0;
    static stack<int> S;
    pre[u] = low[u] = ++idx, S.emplace(u);
    int cnt = 0;
    for(int v : g[u]) if(v != p) {
        if(!pre[v]) {
            ++cnt;
            tarjan(v, u);
            low[u] = min(low[u], low[v]);
            if((!p && cnt > 1) || (p && low[v] >= pre[u])) ap[u] = 1;
            if(low[v] >= pre[u]) {
                bcc.emplace_back(vector<int>(1, u));
                while(bcc.back().back() != v) {
 
 
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Compilation message (stderr)

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:103:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
count_triplets.cpp:105:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

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