Submission #934023

#	Time	Username	Problem	Language	Result	Execution time	Memory
934023		logangd	City (JOI17_city)	C++14	0 / 100	124 ms	23328 KiB

Encoder

#include "Encoder.h"
#include<iostream>
#include<vector>
using namespace std;

using ll=long long;
using vl=vector<ll>;

const int Mx = 250000;

ll t=0;
vl ad[Mx];

pair<ll,ll>dfs(ll u,ll p){
	if(u!=0&&ad[u].size()==1){
		ll p=t;
		Code(u,(t<<18)+t);
		t++;
		return {t-1,t-1};
	}
	ll l=Mx,r=0;
	for(auto i:ad[u]){
		if(i!=p){
			auto rt=dfs(i,u);
			l=min(l,rt.first);
			r=max(r,rt.second);
		}
	}
	Code(u,(l<<18)+r);
	return {l,r};
}

void Encode(int N, int A[], int B[]){
	for(int i=0;i<N-1;i++)
		ad[A[i]].push_back(B[i]),
		ad[B[i]].push_back(A[i]);
	dfs(0,-1);
}

Device

#include "Device.h"

using ll=long long;

void InitDevice(){}

int Answer(long long S, long long T){
	ll l1=S>>18,r1=S-(l1<<18);
	ll l2=T>>18,r2=T-(l2<<18);
	if(l2<=l1&&r1<=r2)return 0;
	if(l1<=l2&&r2<=r1)return 1;
	return 2;
}

Compilation message (stderr)

Encoder.cpp: In function 'std::pair<long long int, long long int> dfs(ll, ll)':
Encoder.cpp:16:6: warning: unused variable 'p' [-Wunused-variable]
   16 |   ll p=t;
      |      ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 92