Borderou de evaluare (job #11620)

Compilare: user.cpp: In function 'int main()': user.cpp:9:9: warning: unused variable 'k2' [-Wunused-variable] user.cpp:10:5: warning: unused variable 'nr' [-Wunused-variable] user.cpp:10:10: warning: unused variable 'k' [-Wunused-variable] user.cpp:7:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:11:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:13:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]