Compilare: user.cpp: In function ‘int query(int)’: user.cpp:7:10: warning: statement has no effect [-Wunused-value] for(x;x>0;x-=(x&(x-1))^x) ^ user.cpp: In function ‘void update(int, int, int)’: user.cpp:13:10: warning: statement has no effect [-Wunused-value] for(x;x<=pm;x+=(x&(x-1))^x) ^ user.cpp: In function ‘int main()’: user.cpp:18:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interclasare.in","r",stdin); ^ user.cpp:19:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interclasare.out","w",stdout); ^ user.cpp:22:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n1); ^ user.cpp:24:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v1[i]); ^ user.cpp:41:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n2); ^ user.cpp:43:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v2[i]); ^ user.cpp:36:20: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] poz=up[poz]; ^