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:76:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Comp[ind].size(); i++){ ^ user.cpp:86:47: 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:141:42: 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); ^ user.cpp: In function ‘int main()’: user.cpp:84:30: warning: ‘two’ may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(Comp[ind][two]); ^ user.cpp:75:22: note: ‘two’ was declared here int one, two; ^ user.cpp:83:30: warning: ‘one’ may be used uninitialized in this function [-Wmaybe-uninitialized] dfs(Comp[ind][one]); ^ user.cpp:75:17: note: ‘one’ was declared here int one, two; ^