Compilare: user.cpp: In function ‘void tsort(int)’: user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:45:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<T[nod].size();i++) ^ user.cpp: In function ‘void backtr(int)’: user.cpp:88:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[niv[lvl-1]].size();i++) ^ user.cpp: In function ‘void print()’: user.cpp:112:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(solsize<sol[i].size()) ^