結果

問題 No.2868 Another String of yuusaan
ユーザー lif4635lif4635
提出日時 2025-01-20 21:40:39
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 100 ms / 2,000 ms
コード長 9,081 bytes
コンパイル時間 1,455 ms
コンパイル使用メモリ 82,304 KB
実行使用メモリ 68,864 KB
最終ジャッジ日時 2025-01-20 21:40:44
合計ジャッジ時間 4,347 ms
ジャッジサーバーID
(参考情報)
judge5 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 18
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

# input
import sys
input = sys.stdin.readline
II = lambda : int(input())
MI = lambda : map(int, input().split())
LI = lambda : list(map(int, input().split()))
SI = lambda : input().rstrip()
LLI = lambda n : [list(map(int, input().split())) for _ in range(n)]
LSI = lambda n : [input().rstrip() for _ in range(n)]
MI_1 = lambda : map(lambda x:int(x)-1, input().split())
LI_1 = lambda : list(map(lambda x:int(x)-1, input().split()))
def graph(n:int, m:int, dir:bool=False, index:int=-1):
edge = [set() for i in range(n+1+index)]
for _ in range(m):
a,b = map(int, input().split())
a += index
b += index
edge[a].add(b)
if not dir:
edge[b].add(a)
return edge
def graph_w(n:int, m:int, dir:bool=False, index:int=-1):
edge = [set() for i in range(n+1+index)]
for _ in range(m):
a,b,c = map(int, input().split())
a += index
b += index
edge[a].add((b,c))
if not dir:
edge[b].add((a,c))
return edge
mod, inf = 998244353, 1001001001001001001
ordalp = lambda s : ord(s)-65 if s.isupper() else ord(s)-97
ordallalp = lambda s : ord(s)-39 if s.isupper() else ord(s)-97
yes = lambda : print("Yes")
no = lambda : print("No")
yn = lambda flag : print("Yes" if flag else "No")
def acc(a:list[int]):
sa = [0]*(len(a)+1)
for i in range(len(a)):
sa[i+1] = a[i] + sa[i]
return sa
prinf = lambda ans : print(ans if ans < 1000001001001001001 else -1)
alplow = "abcdefghijklmnopqrstuvwxyz"
alpup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alpall = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
URDL = {'U':(-1,0), 'R':(0,1), 'D':(1,0), 'L':(0,-1)}
DIR_4 = [[-1,0],[0,1],[1,0],[0,-1]]
DIR_8 = [[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1],[-1,-1]]
DIR_BISHOP = [[-1,1],[1,1],[1,-1],[-1,-1]]
prime60 = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59]
# sys.setrecursionlimit(10**5)
# sys.set_int_max_str_digits(0)
# https://github.com/tatyam-prime/SortedSet/blob/main/SortedSet.py
import math
from bisect import bisect_left, bisect_right
from typing import Generic, Iterable, Iterator, TypeVar
T = TypeVar('T')
class SortedSet(Generic[T]):
BUCKET_RATIO = 16
SPLIT_RATIO = 24
def __init__(self, a: Iterable[T] = []) -> None:
"Make a new SortedSet from iterable. / O(N) if sorted and unique / O(N log N)"
a = list(a)
n = len(a)
if any(a[i] > a[i + 1] for i in range(n - 1)):
a.sort()
if any(a[i] >= a[i + 1] for i in range(n - 1)):
a, b = [], a
for x in b:
if not a or a[-1] != x:
a.append(x)
n = self.size = len(a)
num_bucket = int(math.ceil(math.sqrt(n / self.BUCKET_RATIO)))
self.a = [a[n * i // num_bucket : n * (i + 1) // num_bucket] for i in range(num_bucket)]
def __iter__(self) -> Iterator[T]:
for i in self.a:
for j in i: yield j
def __reversed__(self) -> Iterator[T]:
for i in reversed(self.a):
for j in reversed(i): yield j
def __eq__(self, other) -> bool:
return list(self) == list(other)
def __len__(self) -> int:
return self.size
def __repr__(self) -> str:
return "SortedSet" + str(self.a)
def __str__(self) -> str:
s = str(list(self))
return "{" + s[1 : len(s) - 1] + "}"
def _position(self, x: T) -> tuple[list[T], int, int]:
"return the bucket, index of the bucket and position in which x should be. self must not be empty."
for i, a in enumerate(self.a):
if x <= a[-1]: break
return (a, i, bisect_left(a, x))
def __contains__(self, x: T) -> bool:
if self.size == 0: return False
a, _, i = self._position(x)
return i != len(a) and a[i] == x
def add(self, x: T) -> bool:
"Add an element and return True if added. / O(√N)"
if self.size == 0:
self.a = [[x]]
self.size = 1
return True
a, b, i = self._position(x)
if i != len(a) and a[i] == x: return False
a.insert(i, x)
self.size += 1
if len(a) > len(self.a) * self.SPLIT_RATIO:
mid = len(a) >> 1
self.a[b:b+1] = [a[:mid], a[mid:]]
return True
def _pop(self, a: list[T], b: int, i: int) -> T:
ans = a.pop(i)
self.size -= 1
if not a: del self.a[b]
return ans
def discard(self, x: T) -> bool:
"Remove an element and return True if removed. / O(√N)"
if self.size == 0: return False
a, b, i = self._position(x)
if i == len(a) or a[i] != x: return False
self._pop(a, b, i)
return True
def lt(self, x: T) -> T | None:
"Find the largest element < x, or None if it doesn't exist."
for a in reversed(self.a):
if a[0] < x:
return a[bisect_left(a, x) - 1]
def le(self, x: T) -> T | None:
"Find the largest element <= x, or None if it doesn't exist."
for a in reversed(self.a):
if a[0] <= x:
return a[bisect_right(a, x) - 1]
def gt(self, x: T) -> T | None:
"Find the smallest element > x, or None if it doesn't exist."
for a in self.a:
if a[-1] > x:
return a[bisect_right(a, x)]
def ge(self, x: T) -> T | None:
"Find the smallest element >= x, or None if it doesn't exist."
for a in self.a:
if a[-1] >= x:
return a[bisect_left(a, x)]
def __getitem__(self, i: int) -> T:
"Return the i-th element."
if i < 0:
for a in reversed(self.a):
i += len(a)
if i >= 0: return a[i]
else:
for a in self.a:
if i < len(a): return a[i]
i -= len(a)
raise IndexError
def pop(self, i: int = -1) -> T:
"Pop and return the i-th element."
if i < 0:
for b, a in enumerate(reversed(self.a)):
i += len(a)
if i >= 0: return self._pop(a, ~b, i)
else:
for b, a in enumerate(self.a):
if i < len(a): return self._pop(a, b, i)
i -= len(a)
raise IndexError
def index(self, x: T) -> int:
"Count the number of elements < x."
ans = 0
for a in self.a:
if a[-1] >= x:
return ans + bisect_left(a, x)
ans += len(a)
return ans
def index_right(self, x: T) -> int:
"Count the number of elements <= x."
ans = 0
for a in self.a:
if a[-1] > x:
return ans + bisect_right(a, x)
ans += len(a)
return ans
class BIT:
def __init__(self, n):
self.n = n
self.data = [0]*(n+1)
def add(self, p, x):
p += 1
while p < self.n:
self.data[p] += x
p += p& -p
def sum0(self, r):
s = 0
while r > 0:
s += self.data[r]
r -= r& -r
return s
def sum(self, l, r):
return self.sum0(r) - self.sum0(l)
def get(self, p):
return self.sum0(p+1) - self.sum0(p)
def __str__(self):
return str([self.get(i) for i in range(self.n)])
def inversion_cnt(lst:list) -> int:
"""
i > j && a_i < a_j
"""
n = len(lst)
maxlst = max(lst)
if maxlst >= n+10:
order = {x:i for i,x in enumerate(sorted(set(lst)))}
lst = [order[x] for x in lst]
ft = BIT(n+10)
ans = [0]*n
for i in range(n):
ans[i] = ft.sum(lst[i]+1,n)
ft.add(lst[i], 1)
return ans
def run_length_encode(s):
encoded = []
n = len(s)
i = 0
while i < n:
current_char = s[i]
count = 0
while i < n and s[i] == current_char:
count += 1
i += 1
encoded.append((current_char, count))
return encoded
n,k = MI()
k -= 1
if k <= n:
print("y")
exit()
# level 25
if n >= 25:
k -= (n-25)
n = 25
# print((1<<51) - 1 > 10**15)
def solve(n,k):
if n == 1:
return "yuusaan"[k]
l = (1<<2*n-1) - 1 #level n-1
if k == 0:
return "y"
elif 1 <= k < l+1:
return solve(n-1,k-1)
elif l+1 <= k < 2*l+1:
return solve(n-1,k-(l+1))
elif 2*l+1 == k:
return "s"
elif 2*l+2 <= k < 3*l+2:
return solve(n-1,k-(2*l+2))
elif 3*l+2 <= k < 4*l+2:
return solve(n-1,k-(3*l+2))
elif 4*l+2 == k:
return "n"
else:
assert False
print(solve(n,k))
# yuu = "suusuus"
# def calc(now):
# res = []
# for i in now:
# if i == "u":
# res.append(yuu)
# else:
# res.append(i)
# return "".join(res)
# now = yuu
# for i in range(3):
# now = calc(now)
# print(*(c for i,c in run_length_encode(now)))
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