Submission #240250

#	Time	Username	Problem	Language	Result	Execution time	Memory
240250		Masterdan	Combo (IOI18_combo)	C++14	100 / 100	39 ms	572 KiB

combo

#include "combo.h"
using namespace std;

string guess_sequence(int N) {
    string p, q, r;
    string S;
    if(press("AB")){
        if(press("A"))
            S="A", p="B", q="X", r="Y";
            else
            p="A", S="B", q="X", r="Y";
    }
    else{
        if(press("X"))
                p="A", q="B", S="X", r="Y";
            else
                p="A", q="B", r="X", S="Y";
    }
    if(N==1)return S;
    for(int i=1;i<N-1;i++){
        int letra=press(S+p+p+S+p+q+S+p+r+S+q);
        if (letra==i)S+=r;
        if (letra==i+1)S+=q;
        if (letra==i+2)S+=p;
    }
    if(press(S+p)==N)return S+p;
    if(press(S+q)==N)return S+q;
    return S+r;
}

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