182. Lucky Numbers

Codeforces

IDCF10269182

Time1000ms

Memory256MB

Difficulty—

English · Original

Formal · Original

You consider a number to be "lucky" if it has any digits equal to 7. For example, 7377, 87, and 98789 are lucky, while 6, 300, and 561 are not lucky. Given a number, figure out whether or not it is a lucky number. The only line of input consists of a single integer $n$. If $n$ is a lucky number, output "YES" (no quotes). Otherwise, output "NO" (no quotes). ## Input The only line of input consists of a single integer $n$. ## Output If $n$ is a lucky number, output "YES" (no quotes). Otherwise, output "NO" (no quotes). [samples]

**Definitions** Let $ n \in \mathbb{Z} $ be the input integer. **Constraints** $ n \in \mathbb{Z} $, with no explicit bounds given. **Objective** Determine whether the decimal representation of $ n $ contains at least one digit equal to $ 7 $. Define: $$ \text{Lucky}(n) = \begin{cases} \text{YES} & \text{if } \exists d \in \text{digits}(n) \text{ such that } d = 7 \\ \text{NO} & \text{otherwise} \end{cases} $$

API Response (JSON)

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    "name": "182. Lucky Numbers",
    "description": {
      "content": "You consider a number to be \"lucky\" if it has any digits equal to 7. For example, 7377, 87, and 98789 are lucky, while 6, 300, and 561 are not lucky. Given a number, figure out whether or not it is a ",
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    "platform": "Codeforces",
    "limit": {
      "time_limit": 1000,
      "memory_limit": 262144
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      "content": "You consider a number to be \"lucky\" if it has any digits equal to 7. For example, 7377, 87, and 98789 are lucky, while 6, 300, and 561 are not lucky. Given a number, figure out whether or not it is a ...",
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