Compilare: user.cpp: In function ‘int main()’: user.cpp:18:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=R; i++) ^ user.cpp:8:24: warning: variable ‘rez’ set but not used [-Wunused-but-set-variable] unsigned long long rez, rez2, R, rez3; ^ user.cpp:8:29: warning: unused variable ‘rez2’ [-Wunused-variable] unsigned long long rez, rez2, R, rez3; ^ user.cpp:10:12: warning: unused variable ‘gamma’ [-Wunused-variable] double gamma = 0.5772156649015328606; ^ user.cpp:6:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perechi3.in","r",stdin); ^ user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perechi3.out","w",stdout); ^ user.cpp:11:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^