Compilare: main.cpp: In function 'int main()': main.cpp:51:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int i = 0 ; i < v[ 1 ] .size() ; i ++ ) | ~~^~~~~~~~~~~~~~~~ main.cpp:72:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for ( int j = 0 ; j < v [ i ] .size() ; j ++ ) | ~~^~~~~~~~~~~~~~~~~ main.cpp:82:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | if ( first == false && sum == v[ i ] .size() ) | ~~~~^~~~~~~~~~~~~~~~~ main.cpp:93:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for ( int j = 0 ; j < v[ i ] .size() ; j ++ ) | ~~^~~~~~~~~~~~~~~~ main.cpp:112:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 112 | for ( int j = 0 ; j < v [ i ] .size() ; j ++ ) | ~~^~~~~~~~~~~~~~~~~ main.cpp:122:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 122 | if ( first == false && sum == v[ i ] .size() ) | ~~~~^~~~~~~~~~~~~~~~~ main.cpp:133:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 133 | for ( int j = 0 ; j < v[ i ] .size() ; j ++ ) | ~~^~~~~~~~~~~~~~~~