제출 #609741

#제출 시각아이디문제언어결과실행 시간메모리
609741daria기지국 (IOI20_stations)C++14
0 / 100
853 ms528 KiB
#include"bits/stdc++.h" #include "stations.h" #include <vector> using namespace std; const int N = 1000; int T = 1; vector<int> adj[N], lb(N, -1); void dfs(int s){ if(lb[s]!=-1) return; lb[s] = T*N; T++; for(auto u : adj[s]) dfs(u); lb[s] += T; } vector<int> label(int n, int k, vector<int> u, vector<int> v) { for(int i=0; i<n-1; ++i){ adj[u[i]].push_back(v[i]); adj[v[i]].push_back(u[i]); } dfs(0); lb.resize(n); return lb; } int find_next_station(int s, int t, vector<int> c) { int y1 = s%N, x1 = s/N; int y2 = t%N, x2 = t/N; //tempi di entrata e uscita dei target if(x1 >= y2 || x2 >= y1){ for(auto u : c){ int y3 = u%N, x3 = u/N; if(x3 < x1 && y1 < y3) return u; } } for(auto u : c){ int y3 = u%N; int x3 = u/N; if(x3 <= x2 && y2 <= y3) return u; } return c[0]; }
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