Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ user.cpp:20:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int solve(int)’: user.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ user.cpp:34:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:73:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[i-2].size();j++) ~^~~~~~~~~~~~~~ user.cpp:79:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[i-2].size();j++) ~^~~~~~~~~~~~~~