제출 #1162882

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1162882		tsengang	Race (IOI11_race)	C++17	0 / 100	11 ms	23924 KiB

race

#include <bits/stdc++.h>
#include "race.h"
using namespace std;
#define ll int
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define ertunt return
#define vodka void
vector<pair<int,int>>v[1000006];
ll ans = 1e9;
bool vis[200006];
bool ckd = 0;
vodka dfs(ll x,queue<int>q,ll cur,int K){
    if(vis[x])ertunt;
    vis[x] = 1;
    if(cur == K){
        ans = min(ans,(ll)q.size());
        ckd = 1;
    }
    while(cur > K){
        cur -= q.front();
        q.pop();
    }
    for(auto [z,y] : v[x]){
        queue<int> g = q;
        g.push(y);
        dfs(z,g,cur+y,K);
    }
}
int best_path(int N,int K,int H[][2],int L[]){
    for(ll i = 0; i < N-1; i++){
        v[H[i][0]].pb({H[i][1],L[i]});
        v[H[i][1]].pb({H[i][0],L[i]});
    }
    vector<int>d;
    for(ll i = 0; i < N; i++){
        if(v[i].size() == 1)d.pb(i);
    }
    for(auto i : d){
        queue<int>f;
        dfs(i,f,0,K);
        fill(vis,vis+N+5,0);
    }
    if(ckd == 1)
        ertunt ans;
    ertunt -1;
}

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