Compilare: user.cpp: In function ‘long long int bs(int, int)’: user.cpp:18:8: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] dr=1LL<<31-1; ^ user.cpp: In function ‘int main()’: user.cpp:36:6: warning: unused variable ‘n’ [-Wunused-variable] int n,p,e,q,mmax=0,nr,d; ^ user.cpp:34:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gfact.in","r",stdin); ^ user.cpp:35:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gfact.out","w",stdout); ^ user.cpp:37:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p,&q); ^ user.cpp: In function ‘long long int bs(int, int)’: user.cpp:30:9: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^ user.cpp: In function ‘int main()’: user.cpp:58:13: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr=bs(p,e); ^ user.cpp:50:14: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr=bs(d,e); ^