Compilare: main.cpp: In function 'int main()': main.cpp:47:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pe>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for (int i=0; i<g[c.vf].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp:24:12: warning: unused variable 'a' [-Wunused-variable] 24 | int n, a, b; | ^ main.cpp:24:15: warning: unused variable 'b' [-Wunused-variable] 24 | int n, a, b; | ^