Compilare: user.cpp: In function ‘void update_aib(int, int, int)’: user.cpp:55:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;k<aib[ind].size(); k+=(k^(k-1))&k) ^ user.cpp: In function ‘int det(int, int)’: user.cpp:102:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(R<0 || R>=ait[k].size()) R=ait[k].size(); ^ user.cpp: In function ‘void read()’: user.cpp:29:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&Q); ^ user.cpp:30:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;i++) scanf("%d",&a[i]); ^ user.cpp: In function ‘void solve()’: user.cpp:133:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:153:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pq.in","r",stdin); ^ user.cpp:154:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pq.out","w",stdout); ^