Compilare: main.cpp: In function 'int main()': main.cpp:25:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 25 | if (v[i].size() < k) { | ~~~~~~~~~~~~^~~ main.cpp:34:26: 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 < v[x].size();i++) { | ~~^~~~~~~~~~~~~