Compilare: main.cpp: In function 'int main()': main.cpp:112:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cntTom[s.tpos][s.jpos][s.turn] == edges[s.jpos].size()) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'char read_char()': main.cpp:23:54: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, sizeof(char), BUFFER_SIZE, fin); ^