Compilare: main.cpp: In function 'int merge(int, int)': main.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] 42 | } | ^ main.cpp: In function 'int main()': main.cpp:73:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(j=1;j<adj[i].size();j++) | ~^~~~~~~~~~~~~~ main.cpp:45:17: warning: unused variable 'l' [-Wunused-variable] 45 | int n,i,j,k,l,a,r,cnt=0; | ^