Submission #92967

#	Time	Username	Problem	Language	Result	Execution time	Memory
92967		beso123	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;
string a="ABXY";
string guess_sequence(int N){
    string s;
for(int k=0;k<a.size();k++)
if(press(a[k])==1){
s+=a[k];
break;
}
for(int k=0;k<a.size();k++){
    string b=s+a[k];
if(press(b)==2){
s=b;
break;
}
}
for(int k=0;k<a.size();k++){
    string b=s+a[k];
if(press(b)==3){
s=b;
break;
}
}
return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | for(int k=0;k<a.size();k++)
      |             ~^~~~~~~~~
combo.cpp:9:14: error: could not convert 'a.std::__cxx11::basic_string<char>::operator[](((std::__cxx11::basic_string<char>::size_type)k))' from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to 'std::string' {aka 'std::__cxx11::basic_string<char>'}
    9 | if(press(a[k])==1){
      |              ^
      |              |
      |              __gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type {aka char}
combo.cpp:13:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | for(int k=0;k<a.size();k++){
      |             ~^~~~~~~~~
combo.cpp:20:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 | for(int k=0;k<a.size();k++){
      |             ~^~~~~~~~~