Compilare: user.cpp: In function ‘void solve()’: user.cpp:78:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[1].size();i++) ^ user.cpp:104:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[nod1].size();i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:117:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<A[x].size();i++) ^ user.cpp: In member function ‘void inputReader::getBuffer()’: user.cpp:24:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, bufferDim, stdin); ^