Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[10005]’ [-Wformat=] scanf("%s",&a); ^ user.cpp:20:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(!st.empty()&&st.top() < x && y + st.size() >= m) ^ user.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()!=m) ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alibaba.in","r",stdin); ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alibaba.out","w",stdout); ^ user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:15:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&a); ^