Borderou de evaluare (job #19763)

Eroare de compilare: user.cpp: In function 'int main()': user.cpp:16:9: error: 'sqrt' was not declared in this scope user.cpp:7:18: warning: unused variable 'j' [-Wunused-variable] user.cpp:5:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]