#include<bits/stdc++.h>

using namespace std;

int main()

{

int a,b;

while(cin>>a>>b)

{

if(a==-1 || b==-1) continue;

if(a-b>50) cout<<b+100-a<<endl;

else if(b-a>50) cout<<a+100-b<<endl;

else if(a>b) cout<<a-b<<endl;

else cout<<b-a<<endl;

}

}