Compilare: main.cpp: In function 'void dfs(int)': main.cpp:59:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < edges[node].size(); j++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Read(int&)': main.cpp:26:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:31:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^