Range of influence of propagation downwards
from Propagation down the dual segment tree
Range of influence of propagation downwards
code:python
>> table = 0 * SEGTREE_SIZE
>> down_propagate(table, up(5), lambda x,y: "+", "*")
>> debugprint(table)
| * |
| * | + |
| + | * | 0 | 0 |
| 0 | 0 | * | + | 0 | 0 | 0 | 0 |
|0|0|0|0|+|+|0|0|0|0|0|0|0|0|0|0|
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