Compilare: main.cpp: In function 'void slove()': main.cpp:31:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int j = 0; j < tomb[i].size(); j+=2) | ~~^~~~~~~~~~~~~~~~ main.cpp:39:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i = 0; i < tomb[0].size(); ++i) | ~~^~~~~~~~~~~~~~~~