Submission #961314

#	Time	Username	Problem	Language	Result	Execution time	Memory
961314		Macker	Stations (IOI20_stations)	C++17	10 / 100	600 ms	1120 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define FOR(i, n) for (int i = 0; i < n; i++)

vector<int> in, out;
vector<vector<int>> adj;
int tim = 0;

void dfs(int a, int p){
	in[a] = tim++;
	for (auto b : adj[a]){
		if(b != p) dfs(b, a);
	}
	out[a] = tim-1;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector<int> labels(n);
	adj.assign(n, {});
	in = out = vector<int>(n);
	FOR(i, n-1){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs(0, 0);
	FOR(i, n){
		labels[i] = out[i] + 1000*in[i];
	}
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	int ins = s/1000;
	int outs = s%1000;
	int it = t/1000;
	if(ins <= it && outs >= it){
		for (auto i : c) {
			int ii = i/1000;
			int oi = i%1000;
			if(ii > ins && ii <= it && oi >= it) return i;
		}
	}
	else{
		for (auto i : c) {
			if(i / 1000 < ins) return i;	
		}
	}
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:57:1: warning: control reaches end of non-void function [-Wreturn-type]
   57 | }
      | ^

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