Submission #285423

#	Time	Username	Problem	Language	Result	Execution time	Memory
285423		Pichon5	Combo (IOI18_combo)	C++17	97 / 100	40 ms	652 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
string guess_sequence(int N){
    vector<char>v;
    char arr[4]={'A','B','X','Y'};
    int c=0;
    string s="",ss;
    if(press("X")==1){
        s+='X';
    }else{
        if(press("Y")==1){
            s+='Y';
        }else{
            if(press("A")==1){
                s+='A';
            }else{
                s+='B';
            }
        }
    }
    for(int i=0;i<4;i++){
        if(arr[i]!=s[0]){
           v.pb(arr[i]);
        }
    }
    for(int i=2;i<=N;i++){
        ss=s;
        if(i==N){
            ss+=v[0];
            if(press(ss)==i){
                s=ss;
                break;
            }
            ss=s+v[1];
            if(press(ss)==i){
                s=ss;
                break;
            }
            s+=v[2];
            break;
        }
        ss=ss+v[0]+ss+v[1]+v[0]+ss+v[1]+v[1]+ss+v[1]+v[2];
        int x=press(ss);
        if(x==i){
            s+=v[0];
            continue;
        }
        if(x==i+1){
            s+=v[1];
            continue;
        }
        s+=v[2];
    }
    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:9: warning: unused variable 'c' [-Wunused-variable]
    8 |     int c=0;
      |         ^

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