Submission #76368

#	Time	Username	Problem	Language	Result	Execution time	Memory
76368		Sherazin	Combo (IOI18_combo)	C++14	100 / 100	50 ms	556 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

string ret;
vector<string> f = { "A", "B", "X", "Y" };

string guess_sequence(int N) {
       if(press("AB")) {
              if(press("A")) ret = "A";
              else ret = "B";
       } else {
              if(press("X")) ret = "X";
              else ret = "Y";
       }
       for(int i = 0; i < 4; i++) if(f[i] == ret) f.erase(f.begin() + i);
       for(int i = 1; i < N-1; i++) {
              string t = ret+f[0]+f[0]+ret+f[0]+f[1]+ret+f[0]+f[2]+ret+f[1];
              int r = press(t);
              if(r == i+2) ret += f[0];
              else if(r == i+1) ret += f[1];
              else ret += f[2];
       }
       if(N > 1) {
              if(press(ret+f[0]) == N) ret += f[0];
              else if(press(ret+f[1]) == N) ret += f[1];
              else ret += f[2];
       }
       return ret;
}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95