import csv


defaulters = []
MIN_PERCENT = 70

with open("input.csv") as f:
    reader = csv.reader(f)
    for i, row in enumerate(reader):
        if i == 0:
            continue
        attendance = sum(map(int, row[2:]))
        total_days = len(row)
        if attendance < total_days * (MIN_PERCENT / 100):
            defaulters.append(
                [
                    row[0],
                    row[1],
                    attendance,
                    total_days,
                    round((attendance / total_days) * 100, 2),
                ]
            )
with open("defualter.csv", "w") as f:
    writer = csv.writer(f)
    writer.writerow(["Roll", "Name", "Count", "Total", "perc"])
    writer.writerows(defaulters)