#include"communication.h"
#include <vector>
#include <algorithm>
#include <random>
#include <iostream>
using namespace std;
random_device rnd;
//
// --- Sample implementation for the task communication ---
//
// To compile this program with the sample grader, place:
// communication.h communication_sample.cpp sample_grader.cpp
// in a single folder, then open the terminal in this directory (right-click onto an empty spot in the directory,
// left click on "Open in terminal") and enter e.g.:
//
// in this folder. This will create a file a.out in the current directory which you can execute from the terminal
// as ./a.out
// See task statement or sample_grader.cpp for the input specification
//
void encode(int N, int x) {
while(N > 0){
N /= 2;
send(x%2);
send(x%2);
send(x%2);
x /= 2;
}
}
vector<int> a, res;
void brute_force(int x, int i, bool f){
if(i*3 == a.size()){
res.push_back(x);
return;
}
int j = i*3;
if(f){
if(a[j] != a[j+1] && a[j] != a[j+2])
return;
brute_force(x|(a[j]<<i), i+1, a[j] != a[j+2]);
return;
}
if(a[j] == a[j+1])
brute_force(x|(a[j]<<i), i+1, a[j] != a[j+2]);
else if(a[j+1] == a[j+2])
brute_force(x|(a[j+1]<<i), i+1, false);
else{
brute_force(x|(a[j]<<i), i+1, a[j] != a[j+2]);
brute_force(x|(a[j+1]<<i), i+1, a[j+1] != a[j+2]);
}
}
std::pair<int, int> decode(int N) {
a.clear();
while(N > 0){
N /= 2;
a.push_back(receive());
a.push_back(receive());
a.push_back(receive());
}
res.clear();
brute_force(0, 0, 0);
sort(res.begin(), res.end());
if(res[0] == 0) res.erase(res.begin());
if(res.size() == 1) return {res[0], res[0]};
int i = rnd() % res.size(), j;
while((j = rnd() % res.size()) == i);
// cout << res[i] << ' ' << res[j] << endl;
return {res[0], res[1]};
}
Compilation message
communication.cpp: In function 'void brute_force(int, int, bool)':
communication.cpp:32:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | if(i*3 == a.size()){
| ~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
1652 KB |
Output is correct |
| 2 |
Correct |
11 ms |
1600 KB |
Output is correct |
| 3 |
Incorrect |
5 ms |
200 KB |
Not correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
167 ms |
200 KB |
Not correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
