Compilare: user.cpp: In function ‘void add(int, int)’: user.cpp:18:26: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] poz+=poz^(poz&poz-1); ^ user.cpp: In function ‘int find(int)’: user.cpp:27:26: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] poz-=poz^(poz&poz-1); ^ user.cpp: In function ‘int main()’: user.cpp:41:9: warning: unused variable ‘ci’ [-Wunused-variable] int ci=0,nr=0; ^ user.cpp:33:29: 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:34:31: 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:35:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:37:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&vc[i]); ^