Compilare: main.cpp:5:0: warning: ignoring #pragma optimize GCC [-Wunknown-pragmas] #pragma optimize GCC ("03") main.cpp: In function 'void cautbin_sol(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)': main.cpp:126:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=1;i<=e1;i++){ ~^~~~ main.cpp:129:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=1;i<=e2;i++){ ~^~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:17:29: 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); ^