Submission #592124

#	Time	Username	Problem	Language	Result	Execution time	Memory
592124		JJAnawat	Combo (IOI18_combo)	C++14	100 / 100	32 ms	696 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;

string button[4]={"A","B","X","Y"};

string guess_sequence(int N){
    string ans="";
    if(press("AB")){
        ans=(press("A"))?"A":"B";
    }
    else{
        ans=(press("X"))?"X":"Y";
    }
    if(N==1)
        return ans;
    vector<string> rd;
    for(int i=0;i<4;i++){
        if(button[i]!=ans)
            rd.push_back(button[i]);
    }
    for(int i=1;i<N-1;i++){
        int scr=press(ans+rd[0]+ans+rd[1]+rd[0]+ans+rd[1]+rd[1]+ans+rd[1]+rd[2]);
        //AB AXB AXY AXZ
        //else AY
        int sz=ans.size();

        if(scr==sz+1)
            ans+=rd[0];
        else if(scr==sz+2)
            ans+=rd[1];
        else
            ans+=rd[2];
    }

    if(press(ans+rd[0]+ans+rd[1])==ans.size()+1){
        if(press(ans+rd[0])-ans.size())
            ans+=rd[0];
        else
            ans+=rd[1];
    }
    else
        ans+=rd[2];

    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     if(press(ans+rd[0]+ans+rd[1])==ans.size()+1){
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

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