제출 #867560

#제출 시각아이디문제언어결과실행 시간메모리
867560Dec0Dedd콤보 (IOI18_combo)C++14
0 / 100
33 ms1700 KiB
#include <bits/stdc++.h> #include "combo.h" using namespace std; // A, B, X, Y string strend(string s, int n) { while ((int)s.size() < n) s+=s[0]; return s; } string guess_sequence(int n) { string ans; vector<string> v={"A", "B", "X", "Y"}; if (press("AB") > 0) { if (press("A") > 0) ans+="A"; else ans+="B"; } else { if (press("X") > 0) ans+="X"; else ans+="Y"; } for (int j=0; j<4; ++j) { if (v[j] == string(1, ans[0])) { v.erase(v.begin()+j); break; } } for (int i=1; i+1<n; ++i) { string tmp=strend(ans+v[0]+v[0], n)+strend(ans+v[0]+v[1], n)+strend(ans+v[1]+v[0], n); int k=press(tmp)-i; if (k == 0) { ans+=v[2]; continue; } else if (k == 1) { tmp=strend(ans+v[0]+v[0], n); int x=press(tmp)-i; if (x == 0) ans+=v[1]+v[0]; else if (x == 1) ans+=v[0]+v[1]; else ans+=v[0]+v[0]; ++i; } else if (k == 2) { tmp=strend(ans+v[0]+v[0], n); int x=press(tmp)-i; if (x == 0) ans+=v[1]+v[0]; else if (x == 1) ans+=v[0]+v[1]; else ans+=v[0]+v[0]; ++i; } } assert(n-ans.size() <= 1); if ((int)ans.size() < n) { if (press(ans+v[0]) == n) ans+=v[0]; else if (press(ans+v[1]) == n) ans+=v[1]; else ans+=v[2]; } return ans; }
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