Compilare: main.cpp: In function 'int solve(std::vector<std::pair<double, double> >)': main.cpp:60:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<cadran.size();i++) ~^~~~~~~~~~~~~~ main.cpp:59:15: warning: unused variable 'sol' [-Wunused-variable] int cnt=0,sol=0,start=0; ^~~ main.cpp: In constructor 'InputReader::InputReader(const char*)': main.cpp:23:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ main.cpp: In member function 'void InputReader::advance()': main.cpp:52:51: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^