제출 #778848

#제출 시각아이디문제언어결과실행 시간메모리
778848Durza42콤보 (IOI18_combo)C++14
100 / 100
23 ms588 KiB
#include <iostream> #include <vector> #include <array> #include <string> #include "combo.h" #define endl '\n' #define ll long long int using namespace std; constexpr array<char, 4> LETTERS { 'A', 'B', 'X', 'Y' }; string guess_sequence(int N) { string S = "."; if(press("AB") > 0) { if(press("A") > 0) S[0] = 'A'; else S[0] = 'B'; } else { if(press("X") > 0) S[0] = 'X'; else S[0] = 'Y'; } if(N <= 1) return S; vector<string> l; for(int i = 0 ; i < int(LETTERS.size()) ; ++i) { if(LETTERS[i] == S[0]) continue; l.push_back("."); l.back() = LETTERS[i]; } for(int i = 1 ; i < N - 1 ; ++i) { string request = S + l[0] + l[0] + S + l[0] + l[1] + S + l[0] + l[2] + S + l[1]; // cout << '(' << S << ')'; int p = press(request); if(p == int(S.length()) + 0) S += l[2]; if(p == int(S.length()) + 1) S += l[1]; if(p == int(S.length()) + 2) S += l[0]; // else // press("error"); } if(press(S + l[0]) > int(S.length())) { S += l[0]; } else { if(press(S + l[1]) > int(S.length())) S += l[1]; else S += l[2]; } return S; }
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