Compilare: main.cpp: In function 'int main()': main.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~ main.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while(a<v[i].size()&&b<v[v[i][j]].size()&&!z){ | ~^~~~~~~~~~~~ main.cpp:42:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while(a<v[i].size()&&b<v[v[i][j]].size()&&!z){ | ~^~~~~~~~~~~~~~~~~~ main.cpp:59:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i=0;i<v[q.front()].size();i++){ | ~^~~~~~~~~~~~~~~~~~~~