Submission #1080025

#	Time	Username	Problem	Language	Result	Execution time	Memory
1080025		Jawad_Akbar_JJ	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

#include <iostream>
#include <vector>

using namespace std;
const int N1 = 1005;
vector<int> nei[N1];
int d[N1];

vector<int> label(int n, int k, vector<int> u, vector<int> v){
	bool t = 1;
	for (int i=0;i<n-1;i++){
		nei[u[i]].push_back(v[i]);
		nei[v[i]].push_back(u[i]);
		d[u[i]]++;
		d[v[i]]++;
		t &= min(u[i], v[i]) == i / 2;
		t &= max(u[i], v[i]) == i+1;
	}
	vector<int> lab(n, 0);
	if (k == 1e9){
		for (int i=0;i<n-1;i++){
			lab[u[i]] += (1<<v[i]);
			lab[v[i]] += (1<<u[i]);
		}
		lab[0] += 1e8;
		return lab;
	}
	if (t){
		for (int i=0;i<n;i++)
			lab[i] = i+1;
		return lab;
	}

	int mx = 0, mn = 0;
	for (int i=0;i<n;i++){
		if (d[i] > d[mx])
			mx = i;
		if (d[i] < d[mn])
			mn = i;
	}

	// if (d[mx] <= 2){
	// }

	return lab;

}

int ver;

bool dfs(int u, int s, int t, int p = -1){
	if (u == t)
		return 1;
	for (int i : nei[u]){
		if (i == p)
			continue;
		bool b = dfs(i, s, t, u);
		if (b and u == s)
			ver = i;
		if (b)
			return 1;
	}
	return 0;
}

int find_next_station(int s, int t, vector<int> lab){
	int n = lab.size();
	if (lab[0] > 1e8){
		lab[0] -= 1e8;
		for (int i=0;i<n;i++){
			for (int j=0;j<n;j++)
				if ((1<<j) & lab[i])
					nei[i].push_back(j);
		}
		lab[0] += 1e8;
		return lab[ver];
	}
	bool t = true;
	for (int i=0;i<n;i++)
		t &= lab[i] == i+1;

	if (t){
		if (lab[s] < lab[t]){
			for (int i=1;i<=30;i++)
				if ((lab[t]>>i) == lab[s])
					return lab[s] * 2 + ((lab[t] & (1<<(i-1))) == 0);
			return lab[s] / 2;
		}
		else{
			return lab[s] / 2;
		}
	}
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:78:7: error: declaration of 'bool t' shadows a parameter
   78 |  bool t = true;
      |       ^
stations.cpp:66:34: note: 'int t' previously declared here
   66 | int find_next_station(int s, int t, vector<int> lab){
      |                              ~~~~^
stations.cpp:93:1: warning: control reaches end of non-void function [-Wreturn-type]
   93 | }
      | ^