Cola
while 1:
try:
a=int(input())
print(int(a+a/2))
except:
break
Train Swapping
T=input()
for t in range(int(T)):
TT=input()
a=list(map(int,input().split()))
c=0
while a!=sorted(a):
for i in range(len(a)-1):
if a[i]>a[i+1]:
a[i],a[i+1]=a[i+1],a[i]
c+=1
print('Optimal train swapping takes '+str(c)+' swaps.')
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