제출 #594928

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
594928	2022-07-13 07:20:23	czhang2718	Dynamic Diameter (CEOI19_diameter)	C++17	49 / 100	226 ms	37656 KiB

diameter

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#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
const int N=2e5+1;
int n, q, maxW;
vector<int> adj[N];
int edge[N][2];
int W[N];
int ti=-1;
int fst[N], lst[N];
vector<int> et;
ll path[N];
ll mx[4*N];
ll mn[4*N];
ll pref[4*N];
ll suf[4*N];
ll seg[4*N];
ll lazy[4*N];
void pull(int x){
    mx[x]=max(mx[2*x+1], mx[2*x+2]);
    mn[x]=min(mn[2*x+1], mn[2*x+2]);
    pref[x]=max({pref[2*x+1], pref[2*x+2], mx[2*x+2]-2*mn[2*x+1]});
    suf[x]=max({suf[2*x+1], suf[2*x+2], mx[2*x+1]-2*mn[2*x+2]});
    // cout << "seg " << x << " = max " << seg[2*x+1] << ", " << seg[2*x+2] << ", " << pref[2*x+2] << "+" << mx[2*x+1] <<", " << mx[2*x+2] << "+" << suf[2*x+1] << "\n"; 
    seg[x]=max({seg[2*x+1], seg[2*x+2], pref[2*x+2]+mx[2*x+1], mx[2*x+2]+suf[2*x+1]});
 
 
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