Compilare: main.cpp: In function 'void outGraf(std::vector<std::vector<int> >)': main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=0;i<a.size();i++) | ~^~~~~~~~~ main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int j=0;j<a[i].size();j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void outVector(std::vector<int>)': main.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i=0;i<a.size();i++) | ~^~~~~~~~~ main.cpp: In function 'void breathfirst(int, std::vector<std::vector<int> >)': 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<graf[ut[elso]].size();i++) | ~^~~~~~~~~~~~~~~~~~~~~~