Compilare: user.cpp: In function ‘void aib_update(int, int)’: user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<=norm.size();i+=i&(-i)) aib[i]=max(aib[i],s); ^ user.cpp: In function ‘int main()’: user.cpp:50:9: warning: unused variable ‘a’ [-Wunused-variable] int a=norm.size(); ^ user.cpp:31:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("blis.in", "r", stdin); ^ user.cpp:32:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("blis.out", "w", stdout); ^ user.cpp:34:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%s",&k,sir+1); ^