Compilare: main.cpp: In function 'void dfs(int)': main.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size() ; i ++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'char adv()': main.cpp:28:29: 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,SIZE,fin); ^