Compilare: main.cpp: In function 'bool comp(std::vector<int>, std::vector<int>)': main.cpp:19:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i = 0; i < a.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:43:44: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 43 | if (j != 1 && v[i / j - 1][1].size() > mx) { | ~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:73:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 73 | if (v[i][0].size() == mx) | ~~~~~~~~~~~~~~~^~~~~ main.cpp:80:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 80 | if (v[i][0].size() == mx) { | ~~~~~~~~~~~~~~~^~~~~