Submission #652991

#	Time	Username	Problem	Language	Result	Execution time	Memory
652991		mychecksedad	Stations (IOI20_stations)	C++17	0 / 100	799 ms	656 KiB

stations

#include <bits/stdc++.h>
using namespace std;
#define pb push_back


vector<int> label(int n, int k, vector<int> u, vector<int> v){
	int timer = 0, tin[n], tout[n];
	vector<vector<int>> g(n);
	for(int i = 0; i < n-1; ++i) g[u[i]].pb(v[i]), g[v[i]].pb(u[i]);
	function<void(int, int)> dfs = [&](int v, int p){
		tin[v] = ++timer;
		for(int u: g[v]){
			if(u != p) dfs(u, v);
		}
	};

	dfs(0, 0);
	vector<int> l;
	for(int i = 0; i < n; ++i) l.pb(tin[i]);
	return l;
}
int find_next_station(int s, int t, vector<int> c){
	for(int p: c){
		if(p==t) return t;
	}
	int par = c[0];
	if(t <= par)
		return par;
	for(int i = 1; i < c.size() - 1; ++i){
		if(c[i] <= t && t <= c[i + 1]){
			return c[i];
		}
	}

	return par;
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:7:25: warning: unused variable 'tout' [-Wunused-variable]
    7 |  int timer = 0, tin[n], tout[n];
      |                         ^~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |  for(int i = 1; i < c.size() - 1; ++i){
      |                 ~~^~~~~~~~~~~~~~

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