Submission #1016377

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016377		79brue	Saveit (IOI10_saveit)	C++17	Compilation error	0 ms	0 KiB

encoder

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

using namespace std;

namespace {
    int n, h, m;
    vector<int> link[1002];
    int par[1002];
    bool visited[1002];
    int dist[50][1002];
}

void encode(int nv, int nh, int ne, int *v1, int *v2){
    n = nv, h = nh, m = ne;
    for(int i=0; i<m; i++){
        link[v1[i]].push_back(v2[i]);
        link[v2[i]].push_back(v1[i]);
    }

    /// BFS 트리를 인코딩
    queue<int> que;
    que.push(0), visited[0] = 1;
    while(!que.empty()){
        int x = que.front(); que.pop();
        for(int y: link[x]){
            if(visited[y]) continue;
            visited[y] = 1, par[y] = x;
            que.push(y);
        }
    }
    for(int i=1; i<n; i++) for(int j=0; j<10; j++) encode_bit((par[i]>>j)&1);

    /// 거리 차이를 인코딩
    for(int s=0; s<h; s++){
        fill(visited, visited+n+1, 0);
        que.push(s), visited[s] = 1, dist[s][s] = 0;
        while(!que.empty()){
            int x = que.front(); que.pop();
            for(int y: link[x]){
                if(visited[y]) continue;
                visited[y] = 1, dist[s][y] = dist[s][x] + 1;
                que.push(y);
            }
        }
        /// dist[s][0] 인코딩
        for(int i=0; i<10; i++) encode_bit((dist[s][0]>>i)&1);
        /// 나머지 거리 인코딩
        vector<int> vec;
        for(int i=1; i<n; i++){
            int v = dist[s][i] - dist[s][par[i]] + 1;
            vec.push_back(v);
            if((int)vec.size() == 5){
                int val = vec[0] + vec[1]*3 + vec[2]*9 + vec[3]*27 + vec[4]*81;
                for(int d=0; d<8; d++) encode_bit((val>>d)&1);
                vec.clear();
            }
        }
        if(!vec.empty()){
            vec.resize(5);
            int val = vec[0] + vec[1]*3 + vec[2]*9 + vec[3]*27 + vec[4]*81;
            for(int d=0; d<8; d++) encode_bit((val>>d)&1);
            vec.clear();
        }
    }
}

decoder

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

using namespace std;

namespace {
    int n, h, m;
    vector<int> link[1002];
    int par[1002];
    bool visited[1002];
    int dist[50][1002];
}

void encode(int nv, int nh, int ne, int *v1, int *v2){
    n = nv, h = nh, m = ne;
    for(int i=0; i<m; i++){
        link[v1[i]].push_back(v2[i]);
        link[v2[i]].push_back(v1[i]);
    }

    /// BFS 트리를 인코딩
    queue<int> que;
    que.push(0), visited[0] = 1;
    while(!que.empty()){
        int x = que.front(); que.pop();
        for(int y: link[x]){
            if(visited[y]) continue;
            visited[y] = 1, par[y] = x;
            que.push(y);
        }
    }
    for(int i=1; i<n; i++) for(int j=0; j<10; j++) encode_bit((par[i]>>j)&1);

    /// 거리 차이를 인코딩
    for(int s=0; s<h; s++){
        fill(visited, visited+n+1, 0);
        que.push(s), visited[s] = 1, dist[s][s] = 0;
        while(!que.empty()){
            int x = que.front(); que.pop();
            for(int y: link[x]){
                if(visited[y]) continue;
                visited[y] = 1, dist[s][y] = dist[s][x] + 1;
                que.push(y);
            }
        }
        /// dist[s][0] 인코딩
        for(int i=0; i<10; i++) encode_bit((dist[s][0]>>i)&1);
        /// 나머지 거리 인코딩
        vector<int> vec;
        for(int i=1; i<n; i++){
            int v = dist[s][i] - dist[s][par[i]] + 1;
            vec.push_back(v);
            if((int)vec.size() == 5){
                int val = vec[0] + vec[1]*3 + vec[2]*9 + vec[3]*27 + vec[4]*81;
                for(int d=0; d<8; d++) encode_bit((val>>d)&1);
                vec.clear();
            }
        }
        if(!vec.empty()){
            vec.resize(5);
            int val = vec[0] + vec[1]*3 + vec[2]*9 + vec[3]*27 + vec[4]*81;
            for(int d=0; d<8; d++) encode_bit((val>>d)&1);
            vec.clear();
        }
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccyGlX50.o: in function `encode(int, int, int, int*, int*)':
decoder.cpp:(.text+0x34b): undefined reference to `encode_bit(int)'
/usr/bin/ld: decoder.cpp:(.text+0x4d0): undefined reference to `encode_bit(int)'
/usr/bin/ld: decoder.cpp:(.text+0x63b): undefined reference to `encode_bit(int)'
/usr/bin/ld: decoder.cpp:(.text+0x732): undefined reference to `encode_bit(int)'
/usr/bin/ld: /tmp/ccGAKFj3.o: in function `main':
grader_decoder.c:(.text.startup+0x126): undefined reference to `decode(int, int)'
collect2: error: ld returned 1 exit status