제출 #1199648

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1199648		herissonwow2	경주 (Race) (IOI11_race)	C++20	0 / 100	0 ms	320 KiB

race

#include "race.h"
#include <vector>
#include <queue>
#include <iostream>

using namespace std;
const int N = 200001;
int att[N];
int biju[N];
vector<vector<pair<int,int>>> g;
void DFS(int v1){
    for(auto p : g[v1]){
        if(!biju[p.second]){
            att[p.second] = att[v1] + att[p.first];
            DFS(p.second);
        }
    }
}

int best_path(int N, int K, int H[][2], int L[])
{
    for(int i = 0; i < N-1; i++){
        int v1 = H[i][0];
        int v2 = H[i][1];
        int att = L[i];
        g[v1].push_back({att,v2});
        g[v2].push_back({att,v1});
    }
    int res = 0;
    for(int i = 0; i < N; i++){
        fill(att,att+N, 0);
        fill(biju,biju+N, 0);
        att[i] = 0;
        biju[i] = 1;
        DFS(i);
        for(int i = 0;  i < N; i++){
            if(att[i] == K){
                res++;
            }
        }
    }
    //cout << res/2;
    return res/2;

}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57