Calculate Average Grades

You are given a JSON array that represents a list of students. Each student is represented by a JSON object which always has a name key and may contain several subject scores. Your task is to compute the average grade for each student using the formula:

\( \text{average} = \frac{\text{sum of subject scores}}{\text{number of subjects}} \)

If a student does not have any subject scores, the average should be 0. The result should be a JSON array of objects, each with fields name and average. The average must be rounded to one decimal place if applicable.

inputFormat

The input is read from stdin as a single JSON array. Each element in the array is a JSON object representing a student. A student object always contains a name key (a string) and zero or more subject keys with numeric values.

Example input:

[
  {"name": "Alice", "math": 90, "science": 80, "english": 85},
  {"name": "Bob", "math": 75, "science": 70, "english": 65}
]

outputFormat

The output should be written to stdout as a JSON array of objects. Each object must have two keys: name (the student's name) and average (the computed average score as per the formula, rounded to one decimal place if needed).

Example output:

[{"name":"Alice","average":85.0},{"name":"Bob","average":70.0}]

## sample

[
  {"name": "Alice", "math": 90, "science": 80, "english": 85},
  {"name": "Bob", "math": 75, "science": 70, "english": 65},
  {"name": "Charlie", "math": 100, "science": 95, "english": 90}
]

[{"name":"Alice","average":85.0},{"name":"Bob","average":70.0},{"name":"Charlie","average":95.0}]