import sys import csv import json import io

def main(): # Reads the entire content from the 'Stdin' box input_data = sys.stdin.read().strip()

if not input_data:
    print("[]")
    return

# Treat the input string as a file for the CSV reader
f = io.StringIO(input_data)
reader = csv.DictReader(f)

# Configuration for formatting
int_fields = {
    "contest_level", "contestId1", "R1", "contestId2", "R2", 
    "contestId3", "R3", "contestId4", "R4"
}

# Fields where -1 or "null" should become actual JSON null
time_fields = {"T1", "T2", "T3", "T4"}

# The specific keys required by ThemeCP (removes performance, rating, etc.)
required_keys = [
    "date", "topic", "contest_level", 
    "contestId1", "index1", "R1", 
    "contestId2", "index2", "R2", 
    "contestId3", "index3", "R3", 
    "contestId4", "index4", "R4", 
    "T1", "T2", "T3", "T4"
]

json_data = []

for row in reader:
    entry = {}
    for key in required_keys:
        # Get value from CSV, default to empty string if column missing
        val = row.get(key, "")

        # Convert to string to check contents
        str_val = str(val).strip()

        # 1. Handle Null/Empty/Negative-1 conditions
        if str_val.lower() == "null" or str_val == "-1" or str_val == "":
            entry[key] = None

        # 2. Handle Integer conversions
        elif key in int_fields or key in time_fields:
            try:
                # Remove any quotes and convert to int
                entry[key] = int(str_val.replace('"', ''))
            except ValueError:
                entry[key] = str_val

        # 3. Handle Standard Strings (Date, Topic, Index)
        else:
            entry[key] = str_val.replace('"', '')

    json_data.append(entry)

# Output the final JSON string to the 'Stdout' box
print(json.dumps(json_data, indent=2))

if name == "__main__": main()