Submission #500484

#	Time	Username	Problem	Language	Result	Execution time	Memory
500484		Khizri	Combo (IOI18_combo)	C++17	100 / 100	30 ms	576 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string x="ABXY",y="ABXY";
int k=0;
char ask(string ans,int n){
    string p="";
    p+=ans;
    p+=x[0];
    for(int i=0;i<x.size();i++){
        p+=ans;
        p+=x[1];
        p+=x[i];
    }
    int k=press(p);
    if(k==ans.size()+1){
        return x[0];
    }
    else if(k==ans.size()+2){
        return x[1];
    }
    else{
        return x[2];
    }
}
string guess_sequence(int n) {
    string ans="";
    if(press("AB")){
        if(press("A")){
            ans+='A';
        }
        else{
            ans+='B';
        }
    }
    else{
        if(press("X")){
            ans+='X';
        }
        else{
            ans+='Y';
        }
    }
    for(int i=0;i<x.size();i++){
        if(x[i]==ans[0]){
            x.erase(x.begin()+i);
            break;
        }
    }
    for(int i=1;i<n-1;i++){
        ans+=ask(ans,n);
    }
    if(n==1){
        return ans;
    }
    string a=ans,b=ans;
    a+=x[0];
    b+=x[1];
    if(press(a)==n){
        ans+=x[0];
    }
    else if(press(b)==n){
        ans+=x[1];
    }
    else{
        ans+=x[2];
    }
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'char ask(std::string, int)':
combo.cpp:10:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i=0;i<x.size();i++){
      |                 ~^~~~~~~~~
combo.cpp:16:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     if(k==ans.size()+1){
      |        ~^~~~~~~~~~~~~~
combo.cpp:19:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     else if(k==ans.size()+2){
      |             ~^~~~~~~~~~~~~~
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for(int i=0;i<x.size();i++){
      |                 ~^~~~~~~~~

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