Compilare: user.cpp: In function ‘int main()’: user.cpp:56:9: warning: unused variable ‘maxx’ [-Wunused-variable] int maxx = 0; ^ user.cpp:57:9: warning: unused variable ‘j’ [-Wunused-variable] int j =0; ^ user.cpp:52:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paranteze.in", "r", stdin); ^ user.cpp:53:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("paranteze.out", "w", stdout); ^