Submission #76493

#	Time	Username	Problem	Language	Result	Execution time	Memory
76493		igzi	Combo (IOI18_combo)	C++17	100 / 100	59 ms	560 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
 
using namespace std;
 
/*
int press(string p){
cout<<p<<endl;
int k;
cin>>k;
return k;
}*/
 
string guess_sequence(int N){
vector <char> v={'A','B','X','Y'};
string p,ans;
p="AB";
if(press(p)){
    p.clear();
    p="A";
    if(press(p)){
        v.erase(v.begin());
        ans="A";
    }
    else v.erase(v.begin()+1), ans="B";
}
else{
p.clear();
    p="X";
    if(press(p)){
        v.erase(v.begin()+2);
        ans="X";
    }
    else v.erase(v.begin()+3), ans="Y";
}
while(ans.size()<N-1){
    p.clear();
    p+=ans+v[0]+v[0];
    p+=ans+v[0]+v[1];
    p+=ans+v[0]+v[2];
    p+=ans+v[1];
    int tmp=press(p);
    if(tmp==ans.size()) ans+=v[2];
    if(tmp==ans.size()+1) ans+=v[1];
    if(tmp==ans.size()+2) ans+=v[0];
}
if(ans.size()==N) return ans;
p.clear();
p=ans+v[0];
if(press(p)==N) return p;
p.clear();
p=ans+v[1];
if(press(p)==N) return p;
p.clear();
p=ans+v[2];
return p;
}
 
/*
int main()
{
    int n;
    cin>>n;
    cout<<guess_sequence(n)<<endl;
    return 0;
}*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 | while(ans.size()<N-1){
      |       ~~~~~~~~~~^~~~
combo.cpp:43:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     if(tmp==ans.size()) ans+=v[2];
      |        ~~~^~~~~~~~~~~~
combo.cpp:44:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     if(tmp==ans.size()+1) ans+=v[1];
      |        ~~~^~~~~~~~~~~~~~
combo.cpp:45:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     if(tmp==ans.size()+2) ans+=v[0];
      |        ~~~^~~~~~~~~~~~~~
combo.cpp:47:14: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 | if(ans.size()==N) return ans;
      |    ~~~~~~~~~~^~~

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