Submission #128132

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
128132	2019-07-10 12:56:15	WannnabeIOI	Combo (IOI18_combo)	C++14	100 / 100	42 ms	596 KiB

combo

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#include "combo.h"
#include <vector>
using namespace std; 
int head,len=1;
void start();
void end(int N);
string c="ABXY",S,id;
vector<std::string>h[4]; 
string generate_press(){
    return S+id[0]+S+id[1]+id[0]+
    S+id[1]+id[1]+S+id[1]+id[2]; 
}
string guess_sequence(int N){
    start();
    while(len<N-1){
        int opt=press(generate_press())-len;
        S+=id[(opt+2)%3];
        ++len;
    }
    if (len==N-1) end(N);
    return S;
}
void start(){
    S=id="";
    if (press("AB")){
        if (press("A")) S+=c[head=0]; //A
        else S+=c[head=1]; //B
    }
    else{
        if (press("X")) S+=c[head=2]; //X
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 95 / 95