Submission #1080556

#	Time	Username	Problem	Language	Result	Execution time	Memory
1080556		kwongweng	City (JOI17_city)	C++17	30 / 100	324 ms	56480 KiB

Encoder

#include "Encoder.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef long long ll;
#define FOR(i,a,b) for(int i=a; i<b; i++)
#define ROF(i,a,b) for(int i=a; i>=b; i--)
#define pb push_back

const ll N = 125000;
vi g[N*2], p(N*2);
vector<ll> sz(N*2), tin(N*2);
int cnt = 0;

void dfs(int u){
	sz[u]=1;
	for (int v : g[u]){
		if (p[u]==v) continue;
		p[v]=u; dfs(v); sz[u] += sz[v];
	}
}

bool cond(int u, int v){
	return sz[u]<sz[v];
}

void dfs2(int u){
	tin[u] = cnt++;
	for (int v : g[u]){
		if (p[u]==v) continue;
		dfs2(v);
	}
	if (sz[u] >= N) Code(u,tin[u]*N);
	else Code(u,tin[u]*N + sz[u]);
}
void Encode(int n, int A[], int B[])
{
	FOR(i,0,n-1){
		g[A[i]].pb(B[i]); g[B[i]].pb(A[i]);
	}
	dfs(0);
	FOR(i,0,n){
		sort(g[i].begin(), g[i].end(), cond);
	}
	dfs2(0);
}

Device

#include "Device.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef long long ll;
#define FOR(i,a,b) for(int i=a; i<b; i++)
#define ROF(i,a,b) for(int i=a; i>=b; i--)
#define pb push_back

const ll N = 125000;

void InitDevice()
{
}

int Answer(long long S, long long T)
{
	//cout<<S/N<<" "<<S%N<<" "<<T/N<<" "<<T%N<<"\n";
	if (S<T){
		if (T/N < S/N + S%N || S%N == 0) return 1;
		return 2;
	}
	if (S/N < T/N + T%N || T%N == 0) return 0;
	return 2;
}

• Subtask 1: 8 / 8
• Subtask 2: 22 / 92