제출 #589930

#제출 시각아이디문제언어결과실행 시간메모리
589930physics07콤보 (IOI18_combo)C++17
100 / 100
34 ms604 KiB
#include <bits/stdc++.h> #include "combo.h" using namespace std; typedef long long ll; string button[]={"A", "B", "X", "Y"}; string guess_sequence(int n) { string s=""; int p=press("AB"); if(p) s=(press("A")?"A":"B"); else s=(press("X")?"X":"Y"); string start=s; string first=(s[0]=='A'?"B":"A"), second=(s[0]=='X'?"Y":"X"), third; if(n>1) { for(int i=0; i<4; i++) if(!(button[i]==first || button[i]==second || button[i]==s)) third=button[i]; for(int i=0; i<n-2; i++) { string q=""; for(int j=0; j<4; j++) if(button[j]!=start) q+=s+first+button[j]; q+=s+second; int p=press(q); if(p==(int)s.size()) s+=third; else if(p==(int)s.size()+1) s+=second; else s+=first; } string q=s+first+s+second; p=press(q); if(p==(int)s.size()) s+=third; else { q=s+first; if(press(q)==(int)s.size()) s+=second; else s+=first; } } return s; }
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