Submission #996195

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
996195	2024-06-10 08:39:47	Icelast	Growing Trees (BOI11_grow)	C++17	0 / 100	1089 ms	3876 KiB

grow

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#include <iostream>
#include <bits/stdc++.h>
#define ll int
using namespace std;
const ll maxn = 2*1e5+5, INF = 1e9+9;
struct SegmentTree{
    struct Node{
        int sum, lz, mx;
    };
    int n, N;
    vector<Node> T;
    SegmentTree(int n) : n(n){
        N = 1;
        while(N < n) N*=2;
        T.resize(N*2+1, {0, 0, -INF});
    };
    void merge(Node &n, Node a, Node b){
        n.sum = a.sum+b.sum;
        n.mx = max(a.mx, b.mx);
    }
    void upd(int i, ll x){
        auto upd = [&](auto upd, int node, int low, int high, int i, ll x) -> void{
            if(low == high){
                T[node].sum = x;
                T[node].mx = x;
                return;
            }
            int mid = (low+high)/2;
            if(i <= mid){
                upd(upd, node*2, low, mid, i, x);
 
 
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