Borderou de evaluare (job #68079)

Compilare: user.cpp: In function ‘int main()’: user.cpp:22:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] user.cpp:7:19: warning: variable ‘pr’ set but not used [-Wunused-but-set-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:8:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:21:20: warning: ‘first’ may be used uninitialized in this function [-Wuninitialized]