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- #!/usr/bin/env python3
- def comp(s):
- l = []
- for i in s.split():
- l.append(int(i))
- o = ""
- for i in range(0,len(l)):
- if i == 0:
- o += str(l[i]) + " "
- elif l[i] == l[i-1]+1:
- o += str(l[i]) + " "
- t = o.rsplit(" ", 2)
- t[0] = t[0][0]+"-"
- t[1] += " "
- o = "".join(t)
- else:
- o += str(l[i]) + " "
- print(o)
- if __name__ == '__main__':
- s = input()
- comp(s)
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