Asm2

#include <stdio.h>
#include <string.h>

void solve(char * number)
{
  int x[3] = {};
  // check if digits
  for(int i=0; i<3; ++i)
  {
    if ( !isdigit(number[i]) ) return;
    x[i] = number[i] - '0';
  }
  // modify digits
  __asm__ ( "cmp %%eax, %%ebx;"
            "JNE NotEqual;"       // x[0] != x[1]

            "cmp %%eax, %%ecx;"
            "JBE NotEqual;"      // x[0] >= x[2]

            "mov $0, %%dl;"     // dl = 0
            "add %%al, %%dl;"   // dl += a[0]
            "add %%cl, %%dl;"   // dl += a[2]
            "mov $9, %%dh;"
            "cmp %%dl, %%dh;"
            "JB Final;"           // dl > dh

            "movl %%edx, %%ebx;"  // x[1] = edx

            "JMP Final;"

            "NotEqual:"           // swap(x[0], x[2])
            "movl %%eax, %%edx;"
            "movl %%ecx, %%eax;"
            "movl %%edx, %%ecx;"
            "Final:"
           : "=a"(x[0]), "=b"(x[1]), "=c"(x[2]): "a"(x[0]) , "b"(x[1]), "c"(x[2]) );

  // write to number
  for(int i=0; i<3; ++i)
    number[i] = x[i] + '0';
}

int main()
{
  char data[4] = {};
  scanf("%s", data);
  solve(data);
  printf("%s", data);
  return 0;
}