Compilare: main.cpp: In function 'bool checkCommon(const int&, const std::vector<std::vector<int> >&)': main.cpp:13:12: warning: comparison of integer expressions of different signedness: 'const int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | if(len > s[0].size()) | ~~~~^~~~~~~~~~~~~ main.cpp:28:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i = len; i < s[0].size(); i++){ | ~~^~~~~~~~~~~~~ main.cpp:34:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 1; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:35:16: warning: comparison of integer expressions of different signedness: 'const int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | if(len > s[i].size()) | ~~~~^~~~~~~~~~~~~ main.cpp:46:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int j = len; j < s[i].size(); j++){ | ~~^~~~~~~~~~~~~