Compilare: main.cpp: In function 'int findmatch(int)': main.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(i=0;i<adj[curr].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp:33:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(i=0;i<adj[curr].size();i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:15: warning: unused variable 'k' [-Wunused-variable] 47 | int n,i,j,k,l; | ^ main.cpp:47:17: warning: unused variable 'l' [-Wunused-variable] 47 | int n,i,j,k,l; | ^