Compilare: main.cpp: In function 'void dfs(int)': main.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(x=0;x<f[nod].size();x++) | ~^~~~~~~~~~~~~~ main.cpp:47:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(x=0;x<f[nod].size();x++)r[nod][x]=0; | ~^~~~~~~~~~~~~~ main.cpp:34:15: warning: unused variable 'prod' [-Wunused-variable] 34 | long long prod=1; | ^~~~ main.cpp: In function 'int main()': main.cpp:54:9: warning: unused variable 't1' [-Wunused-variable] 54 | int t1,n,i,j,w,a,b; | ^~ main.cpp:54:16: warning: unused variable 'j' [-Wunused-variable] 54 | int t1,n,i,j,w,a,b; | ^ main.cpp:54:18: warning: unused variable 'w' [-Wunused-variable] 54 | int t1,n,i,j,w,a,b; | ^