path1 = 'zadanie2.csv'
path2 = 'zadanie2_.csv'
lines = open(path1).read().splitlines()

new_lines = []
for i, line in enumerate(lines):
    if i > 0:
        kek = line.split(',')

        key = int(kek[0].strip())
        value = kek[1]

        if kek[1] != '':
            new_lines.append([key, value])


new_lines_sorted = sorted(new_lines, key=lambda x: x[0])

prev = 0
for x in new_lines_sorted:
    while x[0] <= prev:
        x[0] += 1
    prev = x[0]



new_lines_sorted_merged = []
for x in new_lines_sorted:
    new_lines_sorted_merged.append(str(x[0]) + ',' + x[1])

print(new_lines_sorted_merged)

open(path2, 'w').write('\n'.join(new_lines_sorted_merged))