Compilare: user.cpp: In function ‘int main()’: user.cpp:16:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((n-i)>=m-portativ.size()&&n>i) ^ user.cpp:19:82: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((!portativ.empty())&&(nota>portativ.top())&&((n-i)>m-portativ.size())) ^ user.cpp:10:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trompeta.in","r",stdin); ^ user.cpp:11:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("trompeta.out","w",stdout); ^ user.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:15:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&nota); ^ user.cpp:18:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&nota); ^