Codeforce 4C solution in python
n = int(input())
d = {}
for i in range(0, n):
s = input()
if s in d:
print(s+str(d[s]))
d[s] += 1
else:
print("OK")
d[s] = 1Codeforce 4C solution in python
n = int(input())
d = {}
for i in range(0, n):
s = input()
if s in d:
print(s+str(d[s]))
d[s] += 1
else:
print("OK")
d[s] = 1Copyright © 2021 Codeinu
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