Compilare: main.cpp: In function 'int main()': main.cpp:41:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(e!=d && (b+e)%2==0) ~^~~ main.cpp:82:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(e!=d && (b+e)%2==0) ~^~~ main.cpp:13:32: warning: unused variable 'e' [-Wunused-variable] unsigned long long c,a,b,d,e,rez=0; ^ main.cpp:14:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.in","r",stdin); ^ main.cpp:15:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.out","w",stdout); ^ main.cpp:16:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&b); ^ main.cpp:63:24: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] int e=a/d; ~^~