Compilare: main.cpp: In function 'int main()': main.cpp:61:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | if(n!=solution.size()) | ~^~~~~~~~~~~~~~~~~ main.cpp:63:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(i=0;i<solution.size();i++) | ~^~~~~~~~~~~~~~~~