Submission #524206

#	Time	Username	Problem	Language	Result	Execution time	Memory
524206		daisy	Combo (IOI18_combo)	C++17	97 / 100	44 ms	544 KiB

combo

#include "combo.h"
std::string guess_sequence(int N) {

    std::string curr,r;
    int t;

    if(press("A")) {curr="A";r="BXY";}
    else if(press("B")) {curr="B";r="AXY";}
    else if(press("X")) {curr="X";r="ABY";}
    else {curr="Y";r="AXB";}

    for(int i=2;i<N;i++)
    {
        t=press(curr+r[0]+r[0]+curr+r[0]+r[1]+curr+r[0]+r[2]+curr+r[1]);
        if(t==i) curr+=r[1];
        else if(t==i+1) curr+=r[0];
        else curr+=r[2];
    }
    if(N>1){
    if(press(curr+r[0])==N) curr+=r[0];
    else if(press(curr+r[1])==N) curr+=r[1];
    else curr+=r[2];
    }
    return curr;
}

• Subtask 1: 5 / 5
• Subtask 2: 92 / 95