Submission #1206320

#TimeUsernameProblemLanguageResultExecution timeMemory
1206320tamyteMessage (IOI24_message)C++20
83.31 / 100
384 ms884 KiB
#include "message.h" using namespace std; #include <bits/stdc++.h> random_device rd; mt19937 rng(rd()); const int P = 5; void send_message(std::vector<bool> M, std::vector<bool> C) { std::vector<bool> A(31, 0); vector<int> dist(31, -1); for (int i = 0; i < 31; ++i) { if (C[i] == 0) { int d = 1; for (int j = (i + 1) % 31; C[j] == 1; j = (j + 1) % 31) { d++; } dist[i] = d; } } for (int i = 0; i < P; ++i) { for (int j = 0; j < 31; ++j) { if (dist[j] != -1) { A[j] = (dist[j] >> i) & 1; } } send_packet(A); } int bit = 0; int N = (int)M.size(); for (int i = 0; i < 31; ++i) { if (dist[i] != -1) { A[i] = (N >> bit) & 1; bit++; } } send_packet(A); bit = 0; while (bit < N) { for (int i = 0; i < 31 && bit < N; ++i) { if (dist[i] != -1) { A[i] = M[bit++]; } } send_packet(A); } } std::vector<bool> receive_message(std::vector<std::vector<bool>> R) { vector<bool> C(31); vector<int> nxt(31); for (int i = 0; i < P; ++i) { auto& v = R[i]; for (int j = 0; j < 31; ++j) { nxt[j] += (1 << i) * v[j]; } } // cout << "NXT = "; // for (int i = 0; i < 31; ++i) { // cout << nxt[i] << " "; // } // cout << "\n"; int st = -1; { vector<int> p(31, -1); for (int i = 0; i < 31; ++i) { p[i] = (i + nxt[i]) % 31; } for (int i = 0; i < 31; ++i) { int d = 0; int ni = i; while (d < 16 && ni >= i) { d++; ni = p[ni]; if (ni == i) break; } // cout << d << " = " << ni << "\n"; if (d == 16 && ni == i) { st = i; break; } } assert(st != -1); int ni = st; C[ni] = 1; ni = p[ni]; while (ni != st) { C[ni] = 1; ni = p[ni]; } } // cout << st << endl; int siz = 0; vector<bool> res; { auto& v = R[P]; int bit = 0; for (int i = 0; i < 31; ++i) { if (C[i] == 1) { siz += (1 << bit) * v[i]; bit++; } } } // cout << "SIZE = " << siz << endl; int bit = 0; for (int i = P + 1; i < (int)R.size(); ++i) { auto& v = R[i]; for (int j = 0; j < 31; ++j) { if (bit < siz && C[j] == 1) { bit++; res.push_back(v[j]); } } } return res; } /* 5 4 0 1 1 0 1 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 1 1 0 0 1 1 1 1 1 1 1 1 4 0 1 1 0 1 0 0 1 0 0 0 0 0 0 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#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...