Compilare: main.cpp: In function 'void show()': main.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while(taken<sol.size()) | ~~~~~^~~~~~~~~~~