Submission #592278

#	Time	Username	Problem	Language	Result	Execution time	Memory
592278		Soumya1	Stations (IOI20_stations)	C++17	52.32 / 100	998 ms	780 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const int mxN = 1005;
vector<int> ad[mxN];
int in[mxN], out[mxN];
int timer;
void dfs(int u, int p) {
	in[u] = timer++;
	for (int v : ad[u]) {
		if (v == p) continue;
		dfs(v, u);
	}
	out[u] = timer - 1;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	timer = 0;
	for (int i = 0; i < n; i++) {
		ad[i].clear();
	}
	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);
	vector<int> ret(n);
	for (int i = 0; i < n; i++) {
		ret[i] = in[i] * 1000 + out[i];
	}
	return ret;
}
int find_in(int x) {
	return x / 1000;
}
int find_out(int x) {
	return x % 1000;
}
bool parent(int p, int u) {
	return find_in(p) <= find_in(u) && find_out(u) <= find_out(p);
}
int find_next_station(int s, int t, vector<int> c) {
	if (parent(s, t)) {
		for (int x : c) {
			if (parent(x, t) && parent(s, x)) return x;
		}
	} else {
		for (int x : c) {
			if (parent(x, s)) return x;
		}
	}
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type]
   51 | }
      | ^

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