Compilare: user.cpp: In function ‘int main()’: user.cpp:29:9: warning: unused variable ‘a’ [-Wunused-variable] i64 a, b, d, ant; ^ user.cpp:29:12: warning: unused variable ‘b’ [-Wunused-variable] i64 a, b, d, ant; ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galagie.in", "r", stdin); ^ user.cpp:27:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galagie.out", "w", stdout); ^ user.cpp:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:33:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&in[i].val); ^