Compilare: main.cpp: In function 'int main()': main.cpp:29:23: warning: unused variable 'jj' [-Wunused-variable] long long n,a,b,x,jj,y,cc; ^~ main.cpp:27:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid3.in","r",stdin); ^ main.cpp:28:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid3.out","w",stdout); ^ main.cpp:30:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ main.cpp:34:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld",&a,&b,&cc); ^