combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | if(ret == res.size() + 1) res += seq[0];
| ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:41:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | else if(ret == res.size() + 2) res += seq[1];
| ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:44:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
44 | if(res.size() + 1 == n) {
| ~~~~~~~~~~~~~~~^~~~
In file included from /usr/include/c++/10/cassert:44,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
from combo.cpp:1:
combo.cpp:54:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
54 | assert(res.size() == n && press(res) == n);
| ~~~~~~~~~~~^~~~