Compilare: main.cpp: In function 'int main()': main.cpp:129:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | for ( k = 0; k < v[i].size(); k++ ) { | ~~^~~~~~~~~~~~~ main.cpp:134:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 134 | if ( poz + 1 < v[j].size() ) | ~~~~~~~~^~~~~~~~~~~~~