Submission #566716

#	Time	Username	Problem	Language	Result	Execution time	Memory
566716		birthdaycake	Saveit (IOI10_saveit)	C++17	Compilation error	0 ms	0 KiB

encoder

#include<bits/stdc++.h>
#include "grader.h"
#include "encoder.h"
 
using namespace std;
 
vector<int>adj[1001];
 
 
int dis[1001],p[1001], j;
void reset(int n){
    j = 0;
    for(int i = 0; i < n; i++) {
        adj[i].clear();
        dis[i] = INT_MAX;
    }
}
 
 
void encode(int n, int h, int p, int a[], int b[]){
    
    reset(n);
    for(int i = 0; i < p; i++){
        adj[a[i]].push_back(b[i]);
        adj[b[i]].push_back(a[i]);
    }
    dis[0] = p[0] = 0;
    vector<int>d = {0};
    while(d.size()){
        for(auto s: adj[d[j]]){
            if(dis[s] == INT_MAX){
                dis[s] = dis[d[j]] + 1;
                p[s] = d[j];
                d.push_back(s);
            }
        }
        j++;
    }
    
    for(int i = 1; i < n; i++){
        for(int k = 0; k < 10; k++){
            if(p[i] & (1 << k)) enocde_bit(1);
            else encode_bit(0);
        }
    }
    for(int i = 1; i < h; i++){
        vector<int>pc(n, INT_MAX);
        pc[i] = j = 0;
        vector<int>b = {i};
        while(b.size()){
            for(auto s:adj[b[j]]){
                if(pc[s] == INT_MAX){
                    pc[s] = pc[b[j]] + 1;
                    b.push_back(s);
                }
            }
            j++;
        }
        for(int i = 1; i < n; i++){
            int diff = pc[i] - pc[p[i]];
            if(diff != 0){
                encode_bit(1);
                if(diff < 0) encode_bit(1);
                else encode_bit(0);
            }else{
                encode_bit(0);
            }
        }
    }
    
    
}
 
 

decoder

#include<bits/stdc++.h>
#include "grader.h"
#include "encoder.h"
 
using namespace std;
 
vector<int>adj[1001];
 
 
int dis[1001],p[1001],diff[1001][1001],j;
void reset(int n){
    j = 0;
    for(int i = 0; i < n; i++) {
        adj[i].clear();
        dis[i] = INT_MAX;
    }
    for(int i = 0; i < n; i++){
        for(int k = 0; k < n; k++) diff[i][k] = 0;
    }
}
 
void decode(int n, int h){
    
    reset(n);
    for(int i = 1; i < n; i++){
        int parent = 0;
        for(int k = 0; k < 10; k++){
            if(decode_bit()) parent += (1 << k);
        }
        adj[i].push_back(parent);
        adj[parent].push_back(i);
    }
    dis[0] = j = 0;
    vector<int>b = {0};
    while(b.size()){
        for(auto s: adj[b[j]]){
            if(dis[s] == INT_MAX){
                dis[s] = dis[b[j]] + 1;
            }
        }
        j++;
    }
    for(int i = 0; i < n; i++) hops(0,i, dis[i]);
    
    
    for(int i = 1; i < h; i++){
        for(int k = 1; k < n; k++){
            int x = decode_bit();
            if(x == 0){
                diff[k][p[k]] = diff[p[k]][k] = 0;
            }else{
                if(decode_bit()){
                    diff[k][p[k]] = 1;
                    diff[p[k]][k] = -1;
                }else{
                    diff[p[k]][k] = 1;
                    diff[k][p[k]] = -1;
                }
            }
            vector<int>pc(n, INT_MAX);
            pc[i] = j = 0;
            vector<int>b = {i};
            while(b.size()){
                for(auto s:adj[b[j]]){
                    if(pc[s] == INT_MAX){
                        pc[s] = pc[b[j]] + diff[b[j]][s];
                        b.push_back(s);
                    }
                }
                j++;
            }
            for(int t = 0; t < n; t++){
                hops(i,t,pc[s]);
            }
        }
    }
    
}
 
 

Compilation message (stderr)

encoder.cpp: In function 'void encode(int, int, int, int*, int*)':
encoder.cpp:27:15: error: invalid types 'int[int]' for array subscript
   27 |     dis[0] = p[0] = 0;
      |               ^
encoder.cpp:33:18: error: invalid types 'int[int]' for array subscript
   33 |                 p[s] = d[j];
      |                  ^
encoder.cpp:42:17: error: invalid types 'int[int]' for array subscript
   42 |             if(p[i] & (1 << k)) enocde_bit(1);
      |                 ^
encoder.cpp:42:33: error: 'enocde_bit' was not declared in this scope; did you mean 'encode_bit'?
   42 |             if(p[i] & (1 << k)) enocde_bit(1);
      |                                 ^~~~~~~~~~
      |                                 encode_bit
encoder.cpp:60:36: error: invalid types 'int[int]' for array subscript
   60 |             int diff = pc[i] - pc[p[i]];
      |                                    ^

decoder.cpp: In function 'void decode(int, int)':
decoder.cpp:73:29: error: 's' was not declared in this scope
   73 |                 hops(i,t,pc[s]);
      |                             ^