Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();++i){ ^ user.cpp: In function ‘void rdfs(int)’: user.cpp:58:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g2[x].size();++i){ ^ user.cpp: In function ‘int getNumber()’: user.cpp:23:17: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] buffIt = 0; ^ user.cpp:30:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, BUFFER_SIZE, 1, inputFile); ^