Compilare: main.cpp: In function 'void eulerPath(int, int, int)': main.cpp:128:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<graf[node].size(); i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:166:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i<log_table.size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp:171:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i<sparse_table.size(); i++) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:173:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j =0; j+(1<<i)<=euler.size(); j++) ~~~~~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:30:29: 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); ^