#include "grader.h"
#include "encoder.h"
#include <bits/stdc++.h>
using namespace std;
void encode(int nv, int nh, int ne, int *v1, int *v2) {
const int STORING_BITS = 10;
vector<vector<int>> g(nv);
vector<int> parrent(nv, -2);
vector<bool> vis(nv, 0);
for (int i = 0; i < ne; i++) {
g[v1[i]].push_back(v2[i]);
g[v2[i]].push_back(v1[i]);
}
function<void(int)> dfs = [&] (int a) {
vis[a] = 1;
for (auto &b : g[a]) {
if (!vis[b]) {
parrent[b] = a;
dfs(b);
}
}
};
parrent[0] = -1;
dfs(0);
int cnt = 0;
for (int i = 1; i < nv; i++) {
for (int bit = 0; bit < STORING_BITS; bit++) {
if (parrent[i] & (1 << bit)) {
encode_bit(1);
cnt++;
} else {
encode_bit(0);
cnt++;
}
}
}
vector<int> stored;
for (int i = 0; i < nh; i++) {
/// calculate the dist from vertex i
vector<int> d(nv, -1);
queue<int> q;
q.push(i);
d[i] = 0;
while (!q.empty()) {
int a = q.front();
q.pop();
for (auto &b : g[a]) {
if (d[b] == -1) {
d[b] = 1 + d[a];
q.push(b);
}
}
}
for (int i = 0; i < nv; i++) {
assert(d[i] != -1);
}
for (int i = 1; i < nv; i++) {
int dif = d[i] - d[parrent[i]];
assert(-1 <= dif && dif <= +1);
stored.push_back(dif + 1);
}
continue;
cout << " : ";
for (int i = 0; i < nv; i++) {
cout << d[i] << " ";
}
cout << "\n";
}
for (int l = 0; l < (int) stored.size(); l += 3) {
int r = min((int) stored.size(), l + 2);
int num = 0;
for (int j = l; j <= r; j++) {
num = num * 3 + stored[j];
}
for (int bit = 0; bit < 5; bit++) {
encode_bit(num % 2);
num /= 2;
}
}
return;
for (auto &send : stored) {
assert(0 <= send && send <= 2);
if (send == 0) {
encode_bit(0);
encode_bit(0);
}
if (send == 1) {
encode_bit(0);
encode_bit(1);
}
if (send == 2) {
encode_bit(1);
encode_bit(0);
}
}
return;
assert((int) stored.size() == nh * (nv - 1));
for (int i = 0; i < nv; i++) {
cout << i << " : " << parrent[i] << "\n";
}
cout << " = ";
for (auto &x : stored) {
cout << x << " ";
}
cout << "\n";
return;
exit(0);
encode_bit(1);
encode_bit(0);
return;
}
#include "grader.h"
#include "decoder.h"
#include <bits/stdc++.h>
using namespace std;
void decode(int nv, int nh) {
const int STORING_BITS = 10;
vector<int> parrent(nv, 0);
parrent[0] = -1;
for (int i = 1; i < nv; i++) {
for (int bit = 0; bit < STORING_BITS; bit++) {
int x = decode_bit();
parrent[i] += (1 << bit) * x;
}
}
// cout << "hey\n";
for (int l = 0; l < (int) stored.size(); l += 3) {
int r = min((int) stored.size(), l + 2);
int num = 0;
for (int bit = 0; bit < 5; bit++) {
num += (1 << bit) * decode_bit();
}
for (int j = r; j >= l; j--) {
stored[j] = num % 3;
num /= 3;
}
}
int po = 0;
for (int r = 0; r < nh; r++) {
/// calculate the dist from vertex i
vector<vector<pair<int, int>>> g(nv);
for (int i = 1; i < nv; i++) {
int dif = stored[po++] - 1;
int j = parrent[i];
g[i].push_back({j, dif});
g[j].push_back({i, -dif});
}
const int TOKEN = -(int) 1e9;
vector<int> sol(nv, TOKEN);
sol[r] = 0;
function<void(int)> explore = [&] (int a) {
for (auto &b : g[a]) {
if (sol[b.first] == TOKEN) {
sol[b.first] = sol[a] - b.second;
explore(b.first);
}
}
};
explore(r);
for (int i = 0; i < nv; i++) {
hops(r, i, sol[i]);
}
}
}
Compilation message
decoder.cpp: In function 'void decode(int, int)':
decoder.cpp:19:29: error: 'stored' was not declared in this scope
19 | for (int l = 0; l < (int) stored.size(); l += 3) {
| ^~~~~~
decoder.cpp:35:17: error: 'stored' was not declared in this scope
35 | int dif = stored[po++] - 1;
| ^~~~~~
