Compilare: user.cpp: In function ‘int Update(const point&, const point&)’: user.cpp:65: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp: In function ‘double solve()’: user.cpp:73: warning: unused variable ‘j’ user.cpp:74: warning: unused variable ‘a’ user.cpp:74: warning: unused variable ‘b’ user.cpp: In function ‘int main()’: user.cpp:103: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:104: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:107: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:138: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result