Submission #336976

#	Time	Username	Problem	Language	Result	Execution time	Memory
336976		Register	Stations (IOI20_stations)	C++14	0 / 100	3047 ms	2097156 KiB

stations

#include <bits/stdc++.h>
#define y e[x][i]
using namespace std;
typedef vector<int> vec;
int sum;
vector<vec> e;
vec res;
void dfs(int x,int fa,bool d){
	if(d) res[x]=sum++;
	for(int i=0;i<e[x].size();i++)
		if(y!=fa) dfs(y,x,d^1);
	if(!d) res[x]=sum++;
}
vec label(int n,int k,vec u,vec v){
	res.resize(n);e.resize(n,vec());
	for(int i=0;i<n-1;i++) {e[u[i]].push_back(v[i]);e[v[i]].push_back(u[i]);}
	sum=0;dfs(0,-1,1);return res;
}
int find_next_station(int s,int t,vec c){
	if(c[0]>s){
		if(t<s||c.back()<t) return c.back();
		return *lower_bound(c.begin(),c.end(),t);
	}
	if(t<c[0]||s<t) return c[0];
	return *(upper_bound(c.begin(),c.end(),t)-1);
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int, bool)':
stations.cpp:10:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for(int i=0;i<e[x].size();i++)
      |              ~^~~~~~~~~~~~

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