#ifndef hwe
#include "message.h"
#endif
#include <bits/stdc++.h>
using namespace std;
#define popcount(n) (__builtin_popcountll((n)))
#define clz(n) (__builtin_clzll((n)))
#define ctz(n) (__builtin_ctzll((n)))
#define lg(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))
const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;
#ifdef hwe
vector<bool> M, C;
vector<vector<bool>> R;
// vector<bool> send_packet(vector<bool> A) {
// assert(A.size() == 31);
// for (int i = 0; i < 31; ++i) if (C[i] == 1) {
// A[i] = random(2);
// }
// R.emplace_back(A);
// return A;
// }
#endif
void send_message(vector<bool> M, vector<bool> C) {
vector<int> pos; pos.reserve(16);
for (int i = 0; i < 31; ++i) if (!C[i]) {
pos.emplace_back(i);
}
assert(pos.size() == 16);
int bitM = 0;
auto nextBit = [&]() {
if (bitM < M.size()) return bool(M[bitM++]);
return !M.back();
};
vector<vector<bool>> packets(66, vector<bool>(31, 0));
// for (int i = 0; i < 16; ++i) {
// int d = (pos[(i + 1) % 16] - pos[i] + 31) % 31;
// packets[d - 1][pos[i]] = 1;
// for (int j = d; j < 66; ++j) {
// packets[j][pos[i]] = nextBit();
// }
// }
// cerr << "mkq\n";
for (auto packet : packets) send_packet(packet);
}
vector<bool> receive_message(vector<vector<bool>> R) {
vector<int> nxt(31, -1);
for (int i = 0; i < 66; ++i) {
vector<bool> packet = R[i];
for (int j = 0; j < 31; ++j) if (packet[j] && nxt[j] == -1) {
nxt[j] = (j + i + 1) % 31;
}
}
vector<int> pos; pos.reserve(16);
for (int i = 0; i < 31; ++i) {
vector<bool> vis(31, false);
int u = i, cycleSize = 0;
while (!vis[u]) {
vis[u] = true, ++cycleSize;
u = nxt[u];
}
if (cycleSize == 16) {
for (int j = 0, u = i; j < 16; ++j, u = nxt[u]) {
pos.emplace_back(u);
}
break;
}
}
sort (pos.begin(), pos.end()); vector<bool> M;
for (int i = 0; i < 16; ++i) {
int d = (pos[(i + 1) % 16] - pos[i] + 31) % 31;
for (int j = d; j < 66; ++j) M.emplace_back(R[j][pos[i]]);
}
int last = M.back();
while (M.back() == last) M.pop_back();
return M;
}
#ifdef hwe
void solve(bool isLocal = false) {
// M.assign(1024, 0), C.assign(31, 0), R.clear();
// for (int i = 0; i < M.size(); ++i) {
// M[i] = random(2);
// }
// vector<int> index(31); iota(index.begin(), index.end(), 0);
// shuffle(index.begin(), index.end(), rng);
// for (int i = 0; i < 15; ++i) C[index[i]] = 1;
// if (isLocal) {
// cerr << "M = ";
// for (auto x : M) cerr << x;
// cerr << '\n';
// cerr << "C = ";
// for (auto x : C) cerr << x;
// cerr << '\n';
// }
// send_message(M, C);
// vector<bool> ans = receive_message(R);
// if (isLocal) {
// cerr << "Ans: ";
// for (auto x : ans) cerr << x;
// cerr << '\n';
// if (ans == M) cerr << "Accepted\n";
// else {
// cerr << "Wrong Answer\n";
// exit(0);
// }
// }
}
signed main() {
ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
for (int _ = 0; _ < 10; ++_) {
solve(true);
}
cerr << '\n'; return 0;
}
#endif
Compilation message
message.cpp: In lambda function:
message.cpp:46:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
46 | if (bitM < M.size()) return bool(M[bitM++]);
| ~~~~~^~~~~~~~~~
message.cpp: In function 'void send_message(std::vector<bool>, std::vector<bool>)':
message.cpp:45:7: warning: variable 'nextBit' set but not used [-Wunused-but-set-variable]
45 | auto nextBit = [&]() {
| ^~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
328 KB |
Possible tampering with sol2mgr[1] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2531 ms |
428 KB |
Possible tampering with sol2mgr[1] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
328 KB |
Possible tampering with sol2mgr[1] |
| 2 |
Halted |
0 ms |
0 KB |
- |
