代码

#include <sys/auxv.h>
#include <stdint.h>

struct DuckInfo {
  uint64_t abi_version;
  const char *stdin_ptr; uint64_t stdin_size;
  char *stdout_ptr; uint64_t stdout_limit; uint64_t stdout_size;
  char *stderr_ptr; uint64_t stderr_limit; uint64_t stderr_size;
  const char *IB_ptr; uint64_t IB_limit;
  char *OB_ptr; uint64_t OB_limit;
  uint64_t tsc_frequency;
} __attribute__((packed));

static unsigned a[100001];

static int cmp(const void *x, const void *y) {
    unsigned ux = *(const unsigned*)x, uy = *(const unsigned*)y;
    return (ux > uy) - (ux < uy);
}

int main() {
    struct DuckInfo *di = (struct DuckInfo*)getauxval(0x6b637564);
    const unsigned *in = (const unsigned*)di->stdin_ptr;
    unsigned n = in[0];
    unsigned i;
    for (i = 0; i < n; i++) a[i] = in[i + 1];
    qsort(a, n, sizeof(unsigned), cmp);
    unsigned *out = (unsigned*)di->stdout_ptr;
    for (i = 0; i < n; i++) out[i] = a[i];
    di->stdout_size = (uint64_t)n * 4;
    __asm__ __volatile__("mov $60,%%rax; xor %%edi,%%edi; syscall" ::: "rax","rdi","rcx","r11","memory");
    return 0;
}

评测结果