Submission #1152228

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1152228	2025-02-18 02:21:19	jnjwnwnw	Roadside Advertisements (NOI17_roadsideadverts)	C++17	100 / 100	102 ms	15256 KiB

roadsideadverts

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#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
#define ll long long
#define fff(i, a, b) for(int i = a; i < b; i++)
#define fffm(i, a, b) for(int i = a; i > b; i--)
#define N 50004
#define LGN 18
ll anc[N][LGN], sm[N], dep[N];
int n, q;
vector<pair<int, ll>> adj[N];
void dfs1(int nod, int frm, int cum_sm, int dpth){
    sm[nod] = cum_sm;
    anc[nod][0] = frm;
    dep[nod] = dpth;
    for(auto [a, b]: adj[nod]){
        if (a != frm){
            dfs1(a, nod, cum_sm+b, dpth+1);
        }
    }
}
void lca_init(){
    fff(j, 1, LGN){
        fff(i, 0, n){
            anc[i][j] = anc[anc[i][j-1]][j-1];
 
 
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• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 40 / 40
• Subtask 4: 30 / 30