Compilare: main.cpp: In function 'int main()': main.cpp:56:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=] 56 | printf("%d\n", solutions.size()); | ~^ ~~~~~~~~~~~~~~~~ | | | | int std::vector<int>::size_type {aka long unsigned int} | %ld