Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘x’ [-Wunused-variable] int n,i,j,k,x,q,c1,c2,pp; ^ user.cpp:7:31: 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:8:32: 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:10:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:12:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&s[i]); ^ user.cpp:46:18: warning: ‘pp’ may be used uninitialized in this function [-Wmaybe-uninitialized] j+=lsb(j); ^