Compilare: main.cpp: In function 'int Parse()': main.cpp:53:52: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(B, BufferSize, 1, stdin), Pos = 0; ^ main.cpp:60:52: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(B, BufferSize, 1, stdin), Pos = 0; ^ main.cpp: In function 'void Read()': main.cpp:67:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arborest.in", "r", stdin); ^ main.cpp:68:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(B, BufferSize, 1, stdin); ^ main.cpp: In function 'void Solve_Print()': main.cpp:90:20: warning: 'Sol' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << Sol << '\n'; ^~~~