Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:69:33: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for (; poz<=n; poz=poz+(poz &(poz-1)^poz)) ^ user.cpp: In function ‘int querry(int)’: user.cpp:76:29: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(; poz; poz=poz-(poz &(poz-1)^poz)) ^ user.cpp: In function ‘int main()’: user.cpp:83:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.in","r",stdin); ^ user.cpp:84:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.out","w",stdout); ^ user.cpp:86:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:88:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:90:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a); ^ user.cpp: In function ‘int bs(int)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^