Compilare: user.cpp: In function ‘void FindLine(std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > >, std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > >, bool, int)’: user.cpp:46: warning: suggest parentheses around comparison in operand of ‘!=’ user.cpp: In function ‘void Read()’: user.cpp:66: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void Print()’: user.cpp:76: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result