Compilare: user.cpp: In function ‘int main()’: user.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1;i <= n;i++){ ^ user.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ll j = 0;j < n;j++){ ^ user.cpp:36:12: warning: unused variable ‘aux’ [-Wunused-variable] ll aux = i; ^ user.cpp:25:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overdrive.in", "r", stdin); ^ user.cpp:26:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("overdrive.out", "w", stdout); ^ user.cpp:30:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:32:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^