Compilare: main.cpp: In function 'int main()': main.cpp:35:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int x=0; x<v[i].size(); ++x) | ~^~~~~~~~~~~~ main.cpp:38:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int k=0;k<v[i].size();++k) | ~^~~~~~~~~~~~ main.cpp:44:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int x=0; x<v[j].size(); ++x) | ~^~~~~~~~~~~~ main.cpp:62:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int x=0; x<v[i].size(); ++x) | ~^~~~~~~~~~~~