Compilare: main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (j = 0; j < ctc[i].size(); ++j) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void bfs(int)': main.cpp:72:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (i = 0; i < l[vf].size(); ++i) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void bfsgt(int)': main.cpp:86:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for (i = 0; i < lt[vf].size(); ++i) | ~~^~~~~~~~~~~~~~~