제출 #719517

#제출 시각아이디문제언어결과실행 시간메모리
719517mseebacher기지국 (IOI20_stations)C++17
0 / 100
793 ms540 KiB
#include "stations.h" #include <bits/stdc++.h> using namespace std; #define MAXI (int)1e3+10 vector<int> ad[MAXI]; vector<int> labels; vector<int> in(MAXI,0); vector<int> out(MAXI,0); int counter = 0; // 1 .. 1e3 // 1e3+1 ... 2e3 void dfs(int x,int e){ in[x] = counter++; for(auto s: ad[x]){ if(s == e) continue; dfs(s,x); } out[x] = counter++; } vector<int> label(int n, int k, vector<int> u, vector<int> v) { labels.assign(n,0); for(int i = 0;i<MAXI;i++) ad[i].clear(); counter = 0; for(int i = 0;i<n-1;i++){ ad[u[i]].push_back(v[i]); ad[v[i]].push_back(u[i]); } dfs(0,-1); for(int i = 0;i<n;i++){ labels[i] = in[i]*1000+out[i]; } return labels; } int find_next_station(int s, int t, std::vector<int> c) { if(c.size() == 1) return c[0]; int in_t = t/1000; int out_t = t%1000; for(int i = 0;i<(int)c.size();i++){ int in_i = c[i]/1000; int out_i = c[i]%1000; if(in_i <= in_t && out_i >= out_t) return c[i]; } return c[0]; }
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