Compilare: main.cpp: In function 'int bfs(int)': main.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (i=0;i<v[nc].size();i++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:15: warning: unused variable 'st' [-Wunused-variable] 32 | int t,m,i,st,dr,mid,x,y,jd; | ^~ main.cpp:32:18: warning: unused variable 'dr' [-Wunused-variable] 32 | int t,m,i,st,dr,mid,x,y,jd; | ^~ main.cpp:32:21: warning: unused variable 'mid' [-Wunused-variable] 32 | int t,m,i,st,dr,mid,x,y,jd; | ^~~