Compilare: user.cpp: In function ‘int lg(int)’: user.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (rez<L[x].size()) ^ user.cpp: In function ‘void make_aint(std::vector<int>&, int)’: user.cpp:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<L.size();i++) ^ user.cpp: In function ‘int dfs(int, int, int)’: user.cpp:74:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp:100:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:142:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavypath.in","r",stdin); ^ user.cpp:144:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:148:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&val[i]); ^ user.cpp:152:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:164:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&t,&x,&y); ^