Compilare: main.cpp: In function 'void solve2()': main.cpp:133:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 133 | for(int i = 0; i < rez.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:132:35: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] 132 | cout<<rez.size() + 1<<" "<<y<<'\n'; | ^~~~ main.cpp:131:8: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] 131 | dfs(x, y, 4, 1); | ~~~^~~~~~~~~~~~