Submission #529603

#	Time	Username	Problem	Language	Result	Execution time	Memory
529603		pokmui9909	Stations (IOI20_stations)	C++17	52.32 / 100	1019 ms	840 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll in[1005], out[1005];
vector<ll> T[1005];
ll num = -1;
void dfs(ll u, ll p){
	in[u] = ++num;
	for(auto v : T[u]){
		if(v == p) continue;
		dfs(v, u);
	}
	out[u] = num;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    num = -1;
    for(int i = 0; i < n; i++) T[i].clear();

	for(int i = 0; i < n - 1; i++){
		T[u[i]].push_back(v[i]);
		T[v[i]].push_back(u[i]);
	}
	dfs(0, -1);
	vector<int> L(n);
	for(int i = 0; i < n; i++){
		L[i] = in[i] * 1000 + out[i];
	}
	return L;
}
bool is_par(ll u, ll v){
    return (u / 1000 <= v / 1000 && v % 1000 <= u % 1000);
}
int find_next_station(int s, int t, std::vector<int> c) {
    if(is_par(s, t)){
        for(auto i : c){
            if(is_par(s, i) && is_par(i, t)){
                return i;
            }
        }
    } else if(is_par(t, s)){
        for(auto i : c){
            if(is_par(t, i) && is_par(i, s)){
                return i;
            }
        }
    } else {
        for(auto i : c){
            if(is_par(i, s)){
                return i;
            }
        }
    }
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:55:1: warning: control reaches end of non-void function [-Wreturn-type]
   55 | }
      | ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61