Compilare: main.cpp: In function 'int main()': main.cpp:3:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i,n) for(int i=0; i<n; i++) main.cpp:370:10: for0(i, sol.size()) ~~~~~~~~~~~~~ main.cpp:370:5: note: in expansion of macro 'for0' for0(i, sol.size()) ^~~~ main.cpp: In member function 'char InParsare::read_character()': main.cpp:65:43: 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, CHARMAX, fin); ^