Python

from typing import List
from collections import defaultdict

def parseNetworkChargebackInfo(rows: List[str]) -> List[str]:
    currency_conversion = {
        'EUR': 100, 'USD': 100, 'SGD': 100, 'BRL': 100,
        'JPY': 1, 'ISK': 1, 'KRW': 1, 'CAD': 100
    }

    valid_disputes = []
    withdrawn_disputes = defaultdict(dict)
    transaction_dates = {}

    for file_data in rows:
        lines = file_data.split('\n')
        file_info = lines[0].split('.')[0]
        network, date = file_info.split('_')
        headers = lines[1].split(',')
        
        field_indices = {field: headers.index(field) for field in 
                         ['transaction', 'merchant', 'amount', 'currency', 'evidence_due_by', 'reason']}

        for line in lines[2:]:
            fields = line.split(',')
            if len(fields) < len(headers):
                continue

            transaction_id = fields[field_indices['transaction']]
            reason = fields[field_indices['reason']]
            
            try:
                amount = int(float(fields[field_indices['amount']]))
                currency = fields[field_indices['currency']]
                evidence_due_by = int(fields[field_indices['evidence_due_by']])
                
                if currency not in currency_conversion or amount < 0 or evidence_due_by < 0:
                    continue
            except (ValueError, KeyError):
                continue

            dispute_id = f"{network}{transaction_id}"
            merchant_id = fields[field_indices['merchant']]
            major_amount = amount / currency_conversion[currency]
            formatted_value = f"{major_amount:.2f}{currency}"

            if reason == 'withdrawn':
                withdrawn_disputes[network][transaction_id] = date
            else:
                valid_disputes.append((dispute_id, merchant_id, formatted_value, evidence_due_by, date))
            
            transaction_dates[transaction_id] = date

    output = []
    for dispute in valid_disputes:
        dispute_id, merchant_id, value, due_by, date = dispute
        network, transaction_id = dispute_id[:4], dispute_id[4:]
        
        if transaction_id in withdrawn_disputes[network]:
            if withdrawn_disputes[network][transaction_id] >= date:
                continue
        
        output.append(f"{dispute_id},{merchant_id},{value},{due_by}")

    return sorted(output)

# Sample test case
rows = [
    "VISA_20230601.csv\n"
    "transaction,merchant,amount,currency,evidence_due_by,reason\n"
    "123890132,47821,37906,USD,1686812400,fraudulent\n"
    "110450953,63724,12750,JPY,1686898800,duplicate\n",
    "JCB_20230604.csv\n"
    "transaction,merchant,currency,amount,evidence_due_by,reason\n"
    "110450953,11000,SGD,15000,1686898820,duplicate"
]

output = parseNetworkChargebackInfo(rows)
for line in output:
    print(line)

Stripe ✅

def max_frame_sum(matrix, frameSize):
    n, m = len(matrix), len(matrix[0])
    max_sum = -1
    elems = set()
    
    for i in range(n - frameSize + 1):
        for j in range(m - frameSize + 1):
            s = 0
            s += sum(matrix[i][j:j+frameSize]) + sum(matrix[i+frameSize-1][j:j+frameSize])
            for k in range(i+1, i+frameSize-1):
                s += matrix[k][j] + matrix[k][j+frameSize-1]
            if s > max_sum:
                max_sum = s
                elems = set()
                elems.update(matrix[i][j:j+frameSize])
                elems.update(matrix[i+frameSize-1][j:j+frameSize])
                for k in range(i+1, i+frameSize-1):
                    elems.add(matrix[k][j])
                    elems.add(matrix[k][j+frameSize-1])
            elif s == max_sum:
                elems.update(matrix[i][j:j+frameSize])
                elems.update(matrix[i+frameSize-1][j:j+frameSize])
                for k in range(i+1, i+frameSize-1):
                    elems.add(matrix[k][j])
                    elems.add(matrix[k][j+frameSize-1])
    
    return sum(elems)

Coinbase(FTE)✅

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