Compilare: user.cpp: In function ‘void radix_sort()’: user.cpp:39:51: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] for(int i=1;i<=n;i++) bucket[(a[i]>>shift)&mask]++; ^ user.cpp:41:50: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] for(int i=n;i;i--) p=bucket[(a[i]>>shift)&mask]--,b[p]=a[i],ind2[p]=ind[i]; ^ user.cpp: In function ‘int get()’: user.cpp:18:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while(buff[pos]<'0' || buff[pos]>'9') nxt; ^ user.cpp:22:12: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] nxt; ^ user.cpp: In function ‘int main()’: user.cpp:57:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triangles.in","r",stdin); ^ user.cpp:58:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triangles.out","w",stdout); ^ user.cpp: In function ‘void solve()’: user.cpp:52:21: warning: ‘L’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=L;i<=L+K-1;i++) printf("%d ",ind[i]); ^