Compilare: main.cpp: In function 'std::vector<int> solve(std::vector<std::vector<int> >&)': main.cpp:11:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(int i = 0;i < v.size();++i) | ~~^~~~~~~~~~ main.cpp:16:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int j = 1;j < tmp.size();++j) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int i = 0;i < ans.size() - 1;++i) | ~~^~~~~~~~~~~~~~~~