Compilare: main.cpp: In function 'void BuildRmqs()': main.cpp:84:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((1 << i) > rmqMin[0].size()) ~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:88:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < rmqMin[0].size(); j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:89:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j + (1 << i) > rmqMin[0].size()) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:20:29: 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); ^