Submission #393815

#TimeUsernameProblemLanguageResultExecution timeMemory
393815ruadhanCombo (IOI18_combo)C++14
5 / 100
1 ms200 KiB
#include "combo.h" #include <bits/stdc++.h> using namespace std; #define sz(x) (int)x.size() // string S; // int N; // int calls = 0; // int press(string p) // { // calls++; // // cout << "pressing " << p << '\n'; // if ((int)p.length() > N * 4) // return -1; // int ret = 0; // int counter = 0; // int i = 0; // int j = 0; // while (i < (int)p.size()) // { // // cout << "i = " << i << '\n'; // while (i < (int)p.size() && j < (int)S.size() && p.at(i) == S.at(j)) // { // i++, j++, counter++; // } // ret = max(ret, counter); // j = 0, i++; // counter = 0; // } // return ret; // } string guess_sequence(int N) { string s = ""; vector<char> ch = {'A', 'B', 'X', 'Y'}; if (press("AB")) s += (press("A") ? "A" : "B"); else s += (press("X") ? "X" : "Y"); ch.erase(find(ch.begin(), ch.end(), s[0])); for (int i = 1; i < N - 1; i++) { string combo = s + ch[0] + s + ch[1] + ch[0] + s + ch[1] + ch[1] + s + ch[1] + ch[2]; int curr_sz = sz(s); int qry = press(combo); // int qry = press(s + ch[0] + s + ch[1] + ch[1]); if (curr_sz + 2 == qry) s += ch[1]; else if (curr_sz + 1 == qry) s += ch[0]; else s += ch[2]; } if (press(s + "A" + s + "B") > sz(s)) s += (press(s + "A") > sz(s) ? "A" : "B"); else s += (press(s + "X") > sz(s) ? "X" : "Y"); return s; } // int main() // { // S = "ABYXBYXBB"; // N = S.length(); // cout << guess_sequence(N) << '\n'; // cerr << "Function Calls = " << calls << '\n'; // return 0; // }
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