제출 #513910

#제출 시각아이디문제언어결과실행 시간메모리
513910thiago_bastos콤보 (IOI18_combo)C++17
100 / 100
34 ms664 KiB
#include "combo.h" std::string guess_sequence(int N) { std :: string S, ch = "ABXY"; if(press("AB")) S += press("A") ? "A" : "B"; else S += press("X") ? "X" : "Y"; if(N == 1) return S; for(int i = 0; i < 4; ++i) { if(ch[i] == S[0]) { ch.erase(ch.begin() + i); break; } } for(int k = 2; k < N; ++k) { std :: string A = S + ch[0] + ch[0]; std :: string B = S + ch[0] + ch[1]; std :: string C = S + ch[0] + ch[2]; std :: string D = S + ch[1]; A += B; A += C; A += D; int p = press(A); if(p < k) S += ch[2]; else if(p == k) S += ch[1]; else S += ch[0]; } std :: string P = S + ch[0] + S + ch[1]; if(press(P) < N) S += ch[2]; else if(press(S + ch[0]) == N) S += ch[0]; else S += ch[1]; return S; }
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