Compilare: main.cpp: In function 'int main()': main.cpp:32:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | if(v[i].size() < k) | ~~~~~~~~~~~~^~~ main.cpp:45:43: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 45 | if(!viz[vec] && v[vec].size() < k){ | ~~~~~~~~~~~~~~^~~