Compilare: user.cpp: In function ‘long long int inmult(long long int (*)[4], long long int (*)[4])’: user.cpp:12:49: warning: no return statement in function returning non-void [-Wreturn-type] a[i][j]=(a[i][j]+1LL*aux[i][e]*aux2[e][j])%mod;}} ^ user.cpp: In function ‘long long int pow(long long int)’: user.cpp:19:8: warning: no return statement in function returning non-void [-Wreturn-type] e=e/2;}} ^ user.cpp: In function ‘int main()’: user.cpp:21:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri.in","r",stdin); ^ user.cpp:22:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri.out","w",stdout); ^ user.cpp:24:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&t); ^ user.cpp:26:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld%lld%lld%lld%lld",&x,&y,&z,&a,&b,&c,&n); ^