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A common exchange.
| Author |
BostonGo
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| Difficulty | 27 kyu (history) | ||
| AVG solve time | 19 sec | ||
| User attempts | 16570 / 20872 | ||
| Genre | life and death ⓒ | ||
| Similar problems | |||
| Created | 2007-11-07 | ||
| Source | Magazine problems collected by Ichimura Sensei. | ||
| Stars | 3.81 (21 votes) | ||
| Collections | |||
| Your attempts | N/A | ||