Compilare: user.cpp: In function ‘int main()’: user.cpp:97:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("order3.in","r",stdin); ^ user.cpp:98:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("order3.out","w",stdout); ^ user.cpp: In function ‘void solve()’: user.cpp:75:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&q); ^ user.cpp:80:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lld",&tip,&val); ^ user.cpp:87:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&val); ^ user.cpp: In function ‘void solve1()’: user.cpp:64:17: warning: array subscript is below array bounds [-Warray-bounds] ans=p2[sum-1]; ^