1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 int abs(int a)
 7 {
 8     return a>0?a:-a;
 9 }
10 int main()
11 {
12     int n,m,i,j,cm,cn,rm,rn,lm,ln;
13     while(~scanf("%d%d",&m,&n))
14     {
15         cm=(int)ceil(sqrt(m));//ceil为向上取整函数“math.h”
16         cn=(int)ceil(sqrt(n));
17         rm=(m-(cm-1)*(cm-1)-1)/2+1;
18         rn=(n-(cn-1)*(cn-1)-1)/2+1;
19         lm=(cm*cm-m)/2+1;
20         ln=(cn*cn-n)/2+1;
21         int sum=(int)abs(cm-cn)+abs(rm-rn)+abs(lm-ln);
22         printf("%d\n",sum);
23     }
24     return 0;
25 }