31 lines
744 B
C++
31 lines
744 B
C++
#include<stdio.h>
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#include<math.h>
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int main()
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{
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int n,m,j,k;
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double i;
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while(scanf("%d%d",&n,&m)&&n&&m)
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{
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k=m-n;i=(1+sqrt(5))/2;
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j=k*i;
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if(n==j)
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printf( "0\n" );
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else
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{
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printf( "1\n" );
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if(n>j)
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printf("%d %d\n",j,j+k );
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for(k=0;k*i<=n;k++)
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if(int(k*i)==n-k)
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printf("%d %d\n",n-k,n);
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for(k=0;k*i<=m;k++)
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if((int(k*i+k)==m)&&(m-k<n))
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printf("%d %d\n",m-k,m);
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for(k=0;k*i<=n+1;k++)
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if((int(k*i)==n)&&(n+k<m))
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printf("%d %d\n",n,n+k);
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}
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}
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return 0;
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}
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