Compilare: main.cpp: In function 'int solve(int, long long int, int*, int*)': main.cpp:122:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'char InParser::read_ch()': main.cpp:15:38: 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); ^