Compilare: main.cpp: In function 'int main()': main.cpp:141:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 141 | for(int j=0;j<s.size();j++){ | ~^~~~~~~~~ main.cpp: In function 'void bfs(int, int, std::pair<int, int>, std::pair<int, int>)': main.cpp:130:30: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized] 130 | cout<<rasp<<" "<<a<<" "<<b; | ^ main.cpp:120:11: note: 'b' was declared here 120 | int a,b; | ^ main.cpp:130:25: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized] 130 | cout<<rasp<<" "<<a<<" "<<b; | ^~~ main.cpp:120:9: note: 'a' was declared here 120 | int a,b; | ^