Compilare: main.cpp: In function 'int main()': main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(j=0;j<adj[curr].size();j++) | ~^~~~~~~~~~~~~~~~~ main.cpp:17:17: warning: unused variable 'l' [-Wunused-variable] 17 | int n,i,j,k,l,m,index,lin,col,t,op,a,b,curr; | ^ main.cpp:17:21: warning: unused variable 'index' [-Wunused-variable] 17 | int n,i,j,k,l,m,index,lin,col,t,op,a,b,curr; | ^~~~~ main.cpp:17:27: warning: unused variable 'lin' [-Wunused-variable] 17 | int n,i,j,k,l,m,index,lin,col,t,op,a,b,curr; | ^~~ main.cpp:17:31: warning: unused variable 'col' [-Wunused-variable] 17 | int n,i,j,k,l,m,index,lin,col,t,op,a,b,curr; | ^~~