제출 #577159

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
5771592022-06-14 08:06:26Valters07Inside information (BOI21_servers)C++14
53 / 100
196 ms32716 KiB
#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
#define fio ios_base::sync_with_stdio(0);cin.tie(0);
#define ll long long
#define en cin.close();return 0;
#define pb push_back
#define fi first//printf("%lli\n",cur);
#define se second//scanf("%lli",&n);
#define r0 return 0;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int N = 120005;
const int LOG = log2(N)+2;
vector<pair<int,int> > g[N];
int par[N][LOG], tin[N], tout[N], tt;
int down[N], up[N], dep[N];
int topar[N];
void dfs(int u, int p)
{
tin[u]=++tt;
par[u][0]=p;
for(int i = 1;i<LOG;i++)
par[u][i]=par[par[u][i-1]][i-1];
for(auto v:g[u])
{
if(v.fi!=p)
{
topar[v.fi]=v.se;
down[v.fi]=(v.se>topar[u]||u==1?down[u]+1:1);
up[v.fi]=(v.se<topar[u]||u==1?up[u]+1:1);
 
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