Compilare: user.cpp: In function ‘int find(int)’: user.cpp:12:14: warning: unused variable ‘s’ [-Wunused-variable] int last,s,f,poz,query_poz,kk; ^ user.cpp:12:16: warning: unused variable ‘f’ [-Wunused-variable] int last,s,f,poz,query_poz,kk; ^ user.cpp: In function ‘int main()’: user.cpp:33:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.in","r",stdin); ^ user.cpp:34:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.out","w",stdout); ^ user.cpp:36:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:38:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p[i]); ^ user.cpp:7:5: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] for( ; poz<=n; poz+=poz&-poz) ^ user.cpp:12:9: note: ‘last’ was declared here int last,s,f,poz,query_poz,kk; ^