Here is my solution to the problem. It works on sample test case but not on
actual ones. The judge returns WA with test set skipped error. Please point
out a mistake if you can find. I can't find what I missed even after
reading the analysis.
def solve(actv, N):
out = ''
owner = {}
for item in actv:
owner[item] = ''
sort_copy = actv[:]
sort_copy.sort()
lastC = ()
lastJ = ()
for each in sort_copy:
if len(lastC)==0 or each[0]>=lastC[1]:
lastC = each
owner[each]='C'
elif len(lastJ)==0 or each[0]>=lastJ[1]:
lastJ = each
owner[each]='J'
else:
return 'IMPOSSIBLE'
for i in actv:
out+=owner[i]
return out
def takeInput():
T = int(input())
for i in range(T):
N = int(input())
actv = []
for j in range(N):
S, E = tuple(map(int, input().split()))
actv.append((S,E))
result = solve(actv, N)
print('Case #{}: '.format(i+1)+result)
takeInput()
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