Submission #1247105

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247105		nvujica	Saveit (IOI10_saveit)	C++20	0 / 100	56 ms	5952 KiB

encoder

#include <bits/stdc++.h>
#include "grader.h"
#include "encoder.h"
#define ll long long

using namespace std;

const int maxn = 1005, maxh = 40;

int dist[maxh][maxn];
queue <int> q;
vector <int> v[maxn];
int bio[maxn];
int par[maxn];

void rek(int x, int p){
	bio[x] = 1;
	par[x] = p;
	
	for(int i = 0; i < v[x].size(); i++){
		int x2 = v[x][i];
		
		if(bio[x2]) continue;
		
		rek(x2, x);
	}
}

void encode(int n, int h, int p, int *a, int *b){
	memset(dist, -1, sizeof dist);
	
	for(int i = 0; i < p; i++){
		v[a[i]].push_back(b[i]);
		v[b[i]].push_back(a[i]);
	}
	
	for(int i = 0; i < h; i++){
		dist[i][i] = 0;
		q.push(i);
		
		while(!q.empty()){
			int x = q.front();
			q.pop();
			
			for(int j = 0; j < v[x].size(); j++){
				int x2 = v[x][j];
				
				if(dist[i][x2] == -1){
					dist[i][x2] = dist[i][x] + 1;
					q.push(x2);
				}
			}
		}
	}
	
	for(int i = 0; i < h; i++){
		for(int j = 9; j >= 0; j--){
			if(dist[0][i] & (1 << j)) encode_bit(1);
			else encode_bit(0);
		}
	}
	
	rek(0, -1);
	
	for(int i = 1; i < n; i++){
		ll b3 = 0;
		
		for(int j = 0; j < h; j++){
			b3 *= 3;
			
			if(dist[j][i] - dist[j][par[i]] == 1) b3 += 1;
			else if(dist[j][i] - dist[j][par[i]] == -1) b3 += 2; 
		}
		
		for(int j = 9; j >= 0; j--){
			if(par[i] & (1 << j)) encode_bit(1);
			else encode_bit(0);
		}
		
		for(int j = 57; j >= 0; j--){
			if(b3 & (1LL << j)) encode_bit(1);
			else encode_bit(0);
		}
	}
}

decoder

#include <bits/stdc++.h>
#define ll long long
#include "grader.h"
#include "decoder.h"

using namespace std;

const int maxn = 1005, maxh = 40;

int dist[maxh][maxn];
int d[maxn][maxh];
vector <int> v[maxn];

void rek(int x, int h){
	for(int i = 0; i < v[x].size(); i++){
		int x2 = v[x][i];
		
		for(int j = 0; j < h; j++){
			dist[j][x2] = dist[j][x] + d[x2][j];
		}
		
		rek(x2, h);
	}
}

void decode(int n, int h){
	for(int i = 0; i < h; i++){
		for(int j = 0; j < 10; j++){
			dist[0][i] *= 2;
			dist[0][i] += decode_bit();
		}
	}
	
	for(int i = 1; i < n; i++){
		int p = 0;
		
		for(int j = 0; j < 10; j++){
			p *= 2;
			p += decode_bit();
		}
		
		v[p].push_back(i);
		
		ll b3 = 0;
		
		for(int j = 0; j < 58; j++){
			b3 *= 2;
			b3 += decode_bit();
		}
		
		for(int j = h - 1; j >= 0; j--){
			int x = b3 % 3;
			
			if(x == 1) d[i][j] = 1;
			if(x == 2) d[i][j] = -1;
			
			b3 /= 3;
		}
	}
	
	rek(0, h);
	
	for(int i = 0; i < h; i++){
		for(int j = 0; j < n; j++){
			hops(i, j, dist[i][j]);
		}
	}
}

• Subtask 1: 0 / 25
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25