def change(rcodeC, i):
holder = rcodeC[i + 1]
rcodeC[i + 1] = rcodeC[i]
rcodeC[i] = holder
return rcodeC
def damage(rcodeD, dmg = 0, count = 0):
for i in rcodeD:
if i == 'S': dmg += 2 ** count
else: count += 1
return dmg
def main(shield, rcode, hacks = 0, count = 0):
while damage(rcode) > shield:
for i in range(len(rcode) - 1):
try:
if rcode[i] == 'C' and rcode[i + 1] != 'C':
hacks += 1
rcode = change(rcode, i)
try:
if all(e == 'C' for e in rcode[rcode.index('C'): -1]) ==
True and damage(rcode) > shield: return 'IMPOSSIBLE'
except ValueError:
if all(e == 'S' for e in rcode[rcode.index('S'): -1]) ==
True and damage(rcode) > shield: return 'IMPOSSIBLE'
except IndexError: None
return hacks
test = int(raw_input("Test data: "))
print '\n'
while test < 1 or test > 100: test = int(raw_input("Between 1 and 100: "))
for i in range(test):
shield = int(raw_input("Shield strength: "))
while shield < 1 or shield > (10 ** 9): shield = int(raw_input("Between 1
and 10^9: "))
rcode = raw_input("Robot code: ")
while all(i == 'C' or i == 'S' for i in rcode) != True or len(rcode) > 30
or len(rcode) < 2: rcode = raw_input("Must be greater than 2 and less than 1;
only 'C' and 'S': ")
print 'Case #' + str(i + 1) + ':', main(shield, list(rcode)), '\n\n\n'
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