Submission #1111061

#TimeUsernameProblemLanguageResultExecution timeMemory
1111061thieunguyenhuyMessage (IOI24_message)C++17
0 / 100
3000 ms872 KiB
#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)) #define Int __int128 #define fi first #define se second typedef long long ll; typedef unsigned long long ull; typedef long double ld; typedef pair<int, int> pii; typedef pair<long long, long long> pll; typedef pair<long long, int> pli; typedef pair<int, long long> pil; typedef vector<pair<int, int>> vii; typedef vector<pair<long long, long long>> vll; typedef vector<pair<long long, int>> vli; typedef vector<pair<int, long long>> vil; template <class T1, class T2> bool maximize(T1 &x, T2 y) { if (x < y) { x = y; return true; } return false; } template <class T1, class T2> bool minimize(T1 &x, T2 y) { if (x > y) { x = y; return true; } return false; } template <class T> void remove_duplicate(vector<T> &ve) { sort (ve.begin(), ve.end()); ve.resize(unique(ve.begin(), ve.end()) - ve.begin()); } mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); template <class T> T random(T l, T r) { return uniform_int_distribution<T>(l, r)(rng); } template <class T> T random(T r) { return rng() % r; } 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; for (int i = 0; i < 31; ++i) if (!C[i]) { pos.emplace_back(i); } assert(pos.size() == 16); // send one bit of C int oneBit = pos[0]; for (int i = 0; i < 5; ++i) { send_packet(vector<bool>(31, BIT(oneBit, i))); } int sz = M.size(), bit = 0, bitM = 0; for (int i = 1; i < 16; ++i) { for (int j = 0; j < 5; ++j) { vector<bool> packet(31, 0); packet[oneBit] = BIT(pos[i], j); for (auto p : pos) if (p != oneBit) { if (i == 1 && j == 0) packet[p] = BIT(sz, bit++); else if (bitM < sz) packet[p] = M[bitM++]; } send_packet(packet); } } } vector<bool> receive_message(vector<vector<bool>> R) { // receive one bit of C int oneBit = 0; for (int i = 0; i < 5; ++i) { vector<bool> packet = R[i]; int zeros = 0, ones = 0; for (auto x : packet) zeros += !x, ones += x; if (ones > zeros) oneBit = ON(oneBit, i); } vector<int> pos = {oneBit}; for (int i = 1; i < 16; ++i) { int p = 0; for (int j = 0; j < 5; ++j) { vector<bool> packet = R[5 * i + j]; if (packet[oneBit]) p = ON(p, j); } pos.emplace_back(p); } int sz = 0, bit = 0; vector<bool> M; for (int i = 1; i < 16; ++i) { for (int j = 0; j < 5; ++j) { vector<bool> packet = R[5 * i + j]; for (auto p : pos) if (p != oneBit) { if (i == 1 && j == 0) sz |= packet[p] * MASK(bit++); else if (M.size() < sz) M.emplace_back(packet[p]); } } } // cerr << "sz = " << sz << '\n'; return M; } #ifdef hwe signed main() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); M.assign(3, 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; for (auto x : M) cerr << x; cerr << '\n'; for (auto x : C) cerr << x; cerr << '\n'; // for (int i = 0; i < 31; ++i) { // int x; cin >> x; // M[i] = x; // } // for (int i = 0; i < 31; ++i) { // int x; cin >> x; // C[i] = x; // } send_message(M, C); cerr << "Packets used: " << R.size() << '\n'; vector<bool> ans = receive_message(R); for (auto x : ans) cerr << x; cerr << '\n'; if (ans == M) cerr << "Accepted\n"; else cerr << "Wrong Answer\n"; cerr << '\n'; return 0; } #endif

Compilation message (stderr)

message.cpp: In function 'std::vector<bool> receive_message(std::vector<std::vector<bool> >)':
message.cpp:136:23: warning: comparison of integer expressions of different signedness: 'std::vector<bool>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  136 |     else if (M.size() < sz) M.emplace_back(packet[p]);
      |              ~~~~~~~~~^~~~
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