Compilare: main.cpp: In function 'int BFS_x_to_y(int, int)': main.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[nod_curent].size(); ++i){ ~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'unsigned int getInt()': main.cpp:54:36: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ main.cpp:58:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^