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def minimumDistances(a):
# Write your code here
d={}
di={}
for i in range(len(a)):
if(a[i] in d):
di[a[i]]=d[a[i]]=abs(d[a[i]]-i)
else:
d[a[i]]=i
if(di=={}):return -1
return min(di.values())
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Minimum Distances
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