Submission #1014544

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014544		nisanduu	Combo (IOI18_combo)	C++14	30 / 100	36 ms	1400 KiB

combo

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

string guess_sequence(int n){
    string st = "";
    char ct = 'A';
    vector<char> cs = {'A','B','X','Y'};
    for(ll i=0;i<1;i++){
        string sx1 = "",sx2 = "";
        sx1 += cs[0];
        sx1 += cs[1];
        int sc11 = press(sx1);
        if(sc11>0){
            sx1 = "";
            sx1 += (cs[0]);
            sc11 = press(sx1);
            if(sc11>0){
                ct = cs[0];
                st += ct;
            }else{
                ct = cs[1];
                st += ct;
            }
        }else{
            sx1 = "";
            sx1 += (cs[2]);
            sc11 = press(sx1);
            if(sc11>0){
                ct = cs[2];
                st += ct;
            }else{
                ct = cs[3];
                st += ct;
            }
        }
    }
    
    
    string ans = st;
    vector<char> other = {'A','B','X','Y'};
    auto ite = find(other.begin(),other.end(),ct);
    other.erase(ite);
    
    for(ll i=1;i<n;i++){
        string s1 = "",s2 = "";
        s1 += (ans + other[0] + ans + other[1]);
        s2 += (ans + other[2]);
        int sc1 = press(s1);
        if(sc1 > ans.size()){
            s1 = (ans + other[0]);
            sc1 = press(s1);
            if(sc1 > ans.size()){
                ans += other[0];
            }else{
                ans += other[1];
            }
        }else{
            ans += other[2];
        }
    }
    return ans;
    
    // ll p = 1;
    // vector<string> possible;
    // for(ll i=0;i<3;i++){
    //     string s2 = "";
    //     s2+=other[i];
    //     for(ll j=0;j<3;j++){
    //         if(i!=j){
    //             string tmp=s2;
    //             tmp += other[j];
    //             possible.push_back(tmp);
    //         }
    //     }
    // }
    // while(p+1 < n){
    //     string s1 = "",s2 = "";
    //     s1 += (ans + possible[0] + ans + possible[1] + ans + possible[2]);
    //     s2 += (ans + possible[3] + ans + possible[4] + ans + possible[5]);
    //     int sc1 = press(s1);
    //     if(sc1 > ans.size()+1){
    //         s1 = (ans + possible[0]+ ans + possible[1]);
    //         s2 = (ans + possible[2]);
    //         sc1 = press(s1);
    //         sc2 = press(s2);
    //         if(sc1 > sc2){
    //             s1 = (ans + possible[0]);
    //         }else{
    //             if(sc2 == ans.size()+1){
    //                 ans = ans + possible[2][0] + possible[2][0];
    //             }else{
    //                 ans = ans + possible[2];
    //             }
    //         }
    //     }else{
    //         s1 = (ans + possible[3]+ ans + possible[4]);
    //         s2 = (ans + possible[5]);
            
    //     }
    // }
    
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:58:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |         if(sc1 > ans.size()){
      |            ~~~~^~~~~~~~~~~~
combo.cpp:61:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             if(sc1 > ans.size()){
      |                ~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95