USACO-gold section I

这里是一些金组的精选题，更考验思维，但有些题目还是很简单的。

建议一天三题。

部分题目可以看到我写的题解，记得点赞QAQ！

UPDATE 2020.3.18：增加了P6099和P6100和P5200和P6100和P5196

1. P6100 - [USACO19FEB] Painting the Barn G
2. P6099 - [USACO19FEB] Dishwashing G
3. P6145 - [USACO20FEB] Timeline G
4. P6146 - [USACO20FEB] Help Yourself G
5. P5425 - [USACO19OPEN] I Would Walk 500 Miles G
6. P5424 - [USACO19OPEN] Snakes G
7. P5426 - [USACO19OPEN] Balancing Inversions G
8. P6006 - [USACO20JAN] Farmer John Solves 3SUM G
9. P6147 - [USACO20FEB] Delegation G
10. P6098 - [USACO19FEB] Cow Land G
11. P5196 - [USACO19JAN] Cow Poetry G
12. P5200 - [USACO19JAN] Sleepy Cow Sorting G