Borderou de evaluare (job #20593)

Compilare: user.c: In function 'main': user.c:16:9: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration] user.c:16:11: warning: incompatible implicit declaration of built-in function 'sqrt' [enabled by default] user.c:7:12: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] user.c:8:12: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] user.c:12:10: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] user.c:15:14: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]