Submission #83859

#	Time	Username	Problem	Language	Result	Execution time	Memory
83859		Vasiljko	Combo (IOI18_combo)	C++14	100 / 100	58 ms	600 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int n) {
    string f="AB";
    string s,a;
    int k=press(f);

    if(k==2){
        s="A";a="BXY";
    }else if(k==1){
        if(press("A")==1) s="A",a="BXY";
        else s="B",a="AXY";
    }else{
        if(press("X")==1) s="X",a="ABY";
        else s="Y",a="ABX";
    }

    for(int i=2;i<=n-1;i++){
        string p=s+a[0]+s+a[1]+a[0]+s+a[1]+a[1]+s+a[1]+a[2];

        int t=press(p);
        if(t==s.length()+1){
            s=s+a[0];
        }else if(t==s.length()+2){
            s=s+a[1];
        }else{
            s=s+a[2];
        }
    }

    if(n==1)return s;

    if(press(s+a[0])==s.length()+1)s=s+a[0];
    else if(press(s+a[1])==s.length()+1)s=s+a[1];
    else s=s+a[2];

    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:24:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if(t==s.length()+1){
      |            ~^~~~~~~~~~~~~~
combo.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         }else if(t==s.length()+2){
      |                  ~^~~~~~~~~~~~~~
combo.cpp:35:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     if(press(s+a[0])==s.length()+1)s=s+a[0];
      |        ~~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:36:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     else if(press(s+a[1])==s.length()+1)s=s+a[1];
      |             ~~~~~~~~~~~~~^~~~~~~~~~~~~~

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