Compilare: user.cpp: In function ‘int main()’: user.cpp:56:9: warning: unused variable ‘min_val’ [-Wunused-variable] int min_val = INT_MAX, max_val = INT_MIN; ^ user.cpp:56:28: warning: unused variable ‘max_val’ [-Wunused-variable] int min_val = INT_MAX, max_val = INT_MIN; ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coach.in", "r", stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coach.out", "w", stdout); ^