1. Vasya can get the number 100 using ten threes, parentheses, and arithmetic operation signs: $100=(33: 3-3: 3) \cdot(33: 3-3: 3)$. Improve his result: use fewer threes and get the number 100. (It is sufficient to provide one example).
Solution. For example: 1) $100=333: 3-33: 3, \quad 2) 100=33 \cdot 3+3: 3$. There are other solutions as well.