Compilare: user.cpp: In function ‘int main()’: user.cpp:18:14: warning: unused variable ‘j’ [-Wunused-variable] ll n, i, j, s, t, d, k; ^ user.cpp:18:17: warning: unused variable ‘s’ [-Wunused-variable] ll n, i, j, s, t, d, k; ^ user.cpp:18:20: warning: unused variable ‘t’ [-Wunused-variable] ll n, i, j, s, t, d, k; ^ user.cpp:15:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma2.in","r",stdin); ^ user.cpp:16:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma2.out","w",stdout); ^ user.cpp:23:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ user.cpp:24:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&k); ^ user.cpp:28:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&k); ^