Submission #1084136

#TimeUsernameProblemLanguageResultExecution timeMemory
1084136SamueleVidPrisoner Challenge (IOI22_prison)C++17
37 / 100
13 ms1368 KiB
#include <bits/stdc++.h> using namespace std; int BASE = 3; int get_bit(int num, int digit) { for (int i = 0; i < digit; i ++) { num /= BASE; } return num % BASE; } vector<vector<int>> devise_strategy(int N) { int digits = log(N) / log(BASE) + 1; // 3 * xxxxxx + y // x = quale cifra sto guardando, sapendo che quelle più alte sono uguali // y = 0 : sono in B e il bit di A è 0 // 1 : sono in B e il bit di A è 1 // 2 : sono in A e devo passare il bit di A in B vector<vector<int>> s((BASE + 1) * (digits + 1) - BASE, vector<int>(N + 1)); for (int x = 0; x < (BASE + 1) * (digits + 1) - BASE; x ++) { int real_x = x + BASE; int bit = real_x % (BASE + 1); int digit = real_x / (BASE + 1); // cout << "--- x, real_x : " << x << " " << real_x << '\n'; // cout << "who, bit, digit " << who << " " << bit << " " << digit << '\n'; if (x == 0) { // start, occupa un po' di casi ma è solo uno tho s[x][0] = 0; int digit_next = digits; for (int j = 1; j <= N; j ++) { int bit_next = get_bit(j, digit_next - 1); s[x][j] = (digit_next * (BASE + 1)) + bit_next - BASE; // cout << "orig : " << (digit_next * (BASE + 1)) + bit_next << '\n'; // cout << s[x][j] << '\n'; } continue; } if (bit < BASE) { // cout << "CASO DIGIT" << '\n'; s[x][0] = 1; int digit_next = digit; // cout << "digit_next -> " << digit_next << '\n'; for (int j = 1; j <= N; j ++) { int bit_next = get_bit(j, digit_next - 1); // cout << "bit_next : " << bit_next << '\n'; if (bit_next < bit) s[x][j] = -2; if (bit < bit_next) s[x][j] = -1; if (bit == bit_next && digit_next > 1) { // in teoria non ci arriva, ma non potrebbe // cout << "orig : " << (digit_next * (BASE + 1)) + BASE << '\n'; s[x][j] = (digit_next * (BASE + 1)) + BASE - BASE; } // cout << s[x][j] << '\n'; } } if (bit == BASE) { // cout << "CASO BASE" << '\n'; s[x][0] = 0; int digit_next = digit - 1; if (digit_next == 0) continue; // finito le digits da controllare :/ for (int j = 1; j <= N; j ++) { int bit_next = get_bit(j, digit_next - 1); s[x][j] = (digit_next * (BASE + 1)) + bit_next - BASE; // cout << "orig : " << (digit_next * (BASE + 1)) + bit_next << '\n'; // cout << s[x][j] << '\n'; } } } return s; }
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