s = list(raw_input())
K = int(raw_input())
alpha = set()
alist = []
for ch in s:
if ch not in alpha:
alpha.add(ch)
alist += [ch]
dp = [[-1 for i in range(27)] for j in range(27)]
def getCount(usable, slot):
if dp[usable][slot] != -1:
return dp[usable][slot]
ret = -1
if slot == 1:
ret = usable
else:
ret = usable * getCount(usable - 1, slot - 1)
dp[usable][slot] = ret
return ret
print(getCount(26, len(alist)) % 1000000007)
if getCount(26, len(alist)) < K:
print "OVER"
else:
cands = list('abcdefghijklmnopqrstuvwxyz')
ans = []
usable = 26
slot = len(alist)
for a in alist:
if slot == 1:
ans += cands[K - 1]
break
for i in range(len(cands)):
if K <= getCount(usable - 1, slot - 1):
ans += cands[i]
cands = cands[:i] + cands[i + 1:]
break
else:
K -= getCount(usable - 1, slot - 1)
usable -= 1
slot -= 1
mapping = {}
for i in range(len(alist)):
mapping[alist[i]] = ans[i]
ansstr = ''
for ch in s:
ansstr += mapping[ch]
print ansstr
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
13 ms |
2 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
