摘要：
Simon loves neatness. So before he goes to bed, Simon wants to complete all chores in the house.Simon's house looks like a rectangular table consisting ofnrows andncolumns from above. All rows of the table are numbered from1tonfrom top to bottom. All columns of the table are numbered from1tonfro 阅读全文
摘要：
One day Greg and his friends were walking in the forest. Overall there werenpeople walking, including Greg. Soon he found himself in front of a river. The guys immediately decided to get across the river. Luckily, there was a boat by the river bank, just where the guys were standing. We know that th 阅读全文