Compilare: main.cpp: In function 'void downtree(int, int)': main.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i=0; i<vecini[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void uptree(int, int, int, int)': main.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=0; i<vecini[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=0; i<vecini[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~ main.cpp:85:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i=0; i<vecini[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~