Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘int F(int)’: user.cpp:76:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp[ind].size(); i++){ ^ user.cpp:88:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp[ind].size() && ok; i++) ^ user.cpp: In function ‘int main()’: user.cpp:139:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp.size(); i++){ ^ user.cpp: In function ‘char nextch()’: user.cpp:10:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^