Submission #321963

#	Time	Username	Problem	Language	Result	Execution time	Memory
321963		katearima	Stations (IOI20_stations)	C++14	100 / 100	1230 ms	56068 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
const int N=1005;
vector<vector<int>> a(N);
vector<int> ans(N);
int i,n,k,m,x,j,t;
void DFS(vector<vector<int>> a, int x,int y,int d){
	if(d%2==0) {ans[y]=t; t++;}
	for(int i=0; i<a[y].size(); i++){
		if(a[y][i]==x) continue;
		DFS(a,y,a[y][i],d+1);
	}
	if(d%2!=0) {ans[y]=t; t++;}
	
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector<int> label(n);
	for(i=0; i<n; i++){
		a[i].clear();
		ans[i]=0;
	}
	for(i=0; i<n-1; i++){
		a[u[i]].push_back(v[i]);
		a[v[i]].push_back(u[i]);
	}
    t=0;
	DFS(a,-1,0,0);
	/*for(i=0; i<n; i++){
		cout<<ans[i]<<endl;
	}*/
	for(i=0; i<n; i++) label[i]=ans[i];
	//ans.clear(); a.clear();
	return label;
}

int find_next_station(int s, int t, vector<int> c) {
	bool parent=true;
	int ans;
	
	if(s<c[0]){
		c.insert(c.begin(),s);
		for(int i=1; i<c.size()-1; i++){
			if(t<=c[i] && t>=c[i-1]+1) return c[i];
		}
		return c[c.size()-1];
	}
	else{
		c.push_back(s);
		for(int i=1; i<c.size()-1; i++){
			if(t>=c[i] && t<=c[i+1]-1) return c[i];
		}
		return c[0];
	}
	//cout<<"ans"<<ans<<endl;
	//if(ans==s) 
	//return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'void DFS(std::vector<std::vector<int> >, int, int, int)':
stations.cpp:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for(int i=0; i<a[y].size(); i++){
      |               ~^~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:44:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |   for(int i=1; i<c.size()-1; i++){
      |                ~^~~~~~~~~~~
stations.cpp:51:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |   for(int i=1; i<c.size()-1; i++){
      |                ~^~~~~~~~~~~
stations.cpp:39:7: warning: unused variable 'parent' [-Wunused-variable]
   39 |  bool parent=true;
      |       ^~~~~~
stations.cpp:40:6: warning: unused variable 'ans' [-Wunused-variable]
   40 |  int ans;
      |      ^~~

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