Submission #480652

#	Time	Username	Problem	Language	Result	Execution time	Memory
480652		couplefire	Combo (IOI18_combo)	C++17	100 / 100	45 ms	596 KiB

combo

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

string guess_sequence(int n){
    string cur = "";
    vector<string> c = {"A", "B", "X", "Y"};
    if(press(c[0]+c[1]))
        if(press(c[0])) cur = c[0];
        else cur = c[1], swap(c[0], c[1]);
    else if(press(c[2])) cur = c[2], swap(c[0], c[2]);
    else cur = c[3], swap(c[3], c[0]);
    if(n==1) return cur;
    for(int i = 2; i<=n-1; ++i){
        int res = press(cur+c[1]+cur+c[2]+c[1]+cur+c[2]+c[2]+cur+c[2]+c[3]);
        if(res==cur.size()+1) cur += c[1];
        else if(res==cur.size()+2) cur += c[2];
        else cur += c[3]; 
    }
    if(press(cur+c[1])==n) cur += c[1];
    else if(press(cur+c[2])==n) cur += c[2];
    else cur += c[3];
    return cur;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:16:15: 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(res==cur.size()+1) cur += c[1];
      |            ~~~^~~~~~~~~~~~~~
combo.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         else if(res==cur.size()+2) cur += c[2];
      |                 ~~~^~~~~~~~~~~~~~

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