Compilare: main.cpp: In function 'int read_int()': main.cpp:47:31: warning: array subscript has type 'char' [-Wchar-subscripts] while(!isd[c = read_char()]); ^ main.cpp:49:16: warning: array subscript has type 'char' [-Wchar-subscripts] while(isd[c]) ^ main.cpp: In function 'int main()': main.cpp:121:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cntTom[s.tpos][s.jpos][s.turn] == edges[s.jpos].size()) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:141:63: 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:38:54: 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); ^