Compilare: user.cpp: In function ‘int main()’: user.cpp:121:43: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld", (X1 + 2 * X2) % mod); ^ user.cpp:89:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("recurenta2.in","r",stdin); ^ user.cpp:90:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("recurenta2.out","w",stdout); ^ user.cpp:92:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d", &A, &B, &C, &X1, &X2, &n); ^