Submission #1029293

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029293		biserailieva	Combo (IOI18_combo)	C++14	100 / 100	21 ms	1812 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
 
using namespace std;
 
typedef long long ll;
 
std::string guess_sequence(int N) {
    string s, t;
 
    if(press(s+'A'+s+'B')>=1) {
        if(press(s+'A')>=1){
            s+='A';
            t="BXY";
        }
        else{
            s+='B';
            t="AXY";
        }
    }
    else{
        if(press(s+'X')>=1){
            s+='X';
            t="ABY";
        }
        else{
            s+='Y';
            t="ABX";
        }
    }
 
    if(N==1) return s;
 
    for(ll i=1; i<N-1; i++){
        ll ans=press(s+t[0]+s+t[1]+t[0]+s+t[1]+t[1]+s+t[1]+t[2]);
        if(ans==i) s+=t[2];
        else if(ans==i+1) s+=t[0];
        else s+=t[1];
    }
 
    if(press(s+t[0]+s+t[1])>=N) {
        if(press(s+t[0])>=N){
            s+=t[0];
        }
        else{
            s+=t[1];
        }
    }
    else{
        s+=t[2];
    }
 
    return s;
}

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