제출 #220621

#제출 시각아이디문제언어결과실행 시간메모리
220621Coroian_David콤보 (IOI18_combo)C++11
100 / 100
41 ms704 KiB
#include "combo.h" std::string guess_sequence(int N) { using namespace std; string s; s.clear(); char ch[4] = {'A', 'B', 'X', 'Y'}; int poz = 0; int x = press("AB"); if(x >= 1) { int y = press("A"); poz = (y == 1 ? 0 : 1); } else { int y = press("X"); poz = (y == 1 ? 2 : 3); } swap(ch[0], ch[poz]); s.resize(1); s[0] = ch[0]; string a; a.clear(); for(int i = 1; i < N - 1; i ++) { a = s + ch[2] + s + ch[3] + ch[1] + s + ch[3] + ch[2] + s + ch[3] + ch[3]; int x = press(a) - i; s.resize(i + 1); s[i] = ch[1 + x]; } if(N == 1) return s; x = press(s + ch[1] + s + ch[2]); if(x == N) { int y = press(s + ch[1]); s.resize(N); s[N - 1] = (y == N ? ch[1] : ch[2]); } else { s.resize(N); s[N - 1] = ch[3]; } return s; }
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