Submission #765098

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
7650982023-06-24 08:23:13vjudge1Roadside Advertisements (NOI17_roadsideadverts)C++17
100 / 100
100 ms23860 KiB
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define ent '\n'
#define all(x) x.begin(), x.end()
#define s second
#define f first
#define pb push_back
typedef long long ll;
using namespace std;
const int maxn = 2e5 + 250;
const int mod = 1e9 + 7;
const int K = 400;
const double Pi = acos(-1.0);
const long double eps = 1e-9;
#define int long long
int a[maxn], pref[maxn];
vector<pair<int,int>>g[maxn];
int tin[maxn], tout[maxn], lev[maxn];
int p[30][maxn];
int timer;
void dfs(int v, int pa = 1) {
lev[v] = lev[pa]+1;
tin[v] = timer++;
p[0][v] = pa;
for(int i = 1;i < 30; i++) {
p[i][v] = p[i-1][p[i-1][v]];
}
for(auto to:g[v]) {
if(to.f==pa)continue;
 
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