


 j2
j2 
  j1:
j1: . i1
. i1 j1
j1 
 i1+i2
 i1+i2 j1+j2
j1+j2| 1 | 1. i2:  2. j2:  3. i2  j2 4. i1:  5. i1 < 0 6.  j1:  . i1+1  j1   i1+1+i2  j1+j2 7. j1:  8. i1  j1  i1+i2  j1+j2 | 
| 2 | 1. i2:  2. j2:  3. i2  j2 4. j1:  5. 0  j1  0+i2  j1+j2 | 
| 3 | 1. i2:  2. j2:  3. i2  j2 4. i1:  5. 0 < i1 6.  j1:  . i1-1  j1   i1-1+i2  j1+j2 7. j1:  8. i1  j1  i1+i2  j1+j2 | 
About:
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