Compilare: main.cpp: In function 'int bfs(int)': main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<graf[cueFront].size();i++) ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int)': main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i<graf[x].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:68:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ main.cpp: In function 'int bfs(int)': main.cpp:34:12: warning: 'cueFront' may be used uninitialized in this function [-Wmaybe-uninitialized] return cueFront; ^~~~~~~~