takeU

n = int(input()) li = list(map(int, input().split())) if len(li) == 1: print('A') elif len(set(li)) == 1: print(li[0]) elif len(li) == 2: print('A') else: a = (li[1] - li[2]) // (li[0] - li[1]) if (li[0] - li[1]) else 0 b = li[1] - li[0] * a for i in range(n - 1): if (li[i + 1] != li[i] * a + b): print('B') exit() print(li[-1] * a + b) 수학

def itots(c): if '0'

def check(): for i in range(n): if a[i] != b[i]: return False return True n, m = map(int, input().split()) a = [list(map(int, list(input()))) for _ in range(n)] b = [list(map(int, list(input()))) for _ in range(n)] ans = 0 for i in range(n - 2): for j in range(m - 2): if a[i][j] != b[i][j]: for x in range(i, i + 3): for y in range(j, j + 3): a[x][y] ^= 1 ans += 1 print(ans if check() else '-1') 구현

from collections import deque n, m = map(int, input().split()) board = [list(map(int, list(input()))) for _ in range(m)] visited = [[0] * n for _ in range(m)] visited[0][0] = 1 dx, dy = [-1, 1, 0, 0], [0, 0, -1, 1] q = deque([[0, 0, 0]]) while q: x, y, c = q.popleft() if x == m - 1 and y == n - 1: print(c) break for i in range(4): nx, ny = x + dx[i], y + dy[i] if 0

from collections import deque n, l, r = map(int, input().split()) board = [list(map(int, input().split())) for _ in range(n)] dx, dy = [-1, 1, 0, 0], [0, 0, -1, 1] def bfs(x, y): q = deque([[x, y]]) li = [[x, y]] visited[x][y] = 1 while q: x, y = q.popleft() for i in range(4): nx, ny = x + dx[i], y + dy[i] if 0

n = int(input()) count = 0 def recursion(s, l, r): global count count += 1 if l >= r: return 1 elif s[l] != s[r]: return 0 else: return recursion(s, l + 1, r - 1) def isPalindrome(s): return recursion(s, 0, len(s) - 1) for _ in range(n): count = 0 print(isPalindrome(input()), count)

print("CY" if int(input()) % 5 in [0, 2] else "SK") 게임 이론

a, b = map(int, input().split()) def is_prime(x): for i in range(2, int(x ** 0.5) + 1): if x % i == 0: return False return True for i in range(a, b + 1): if i in [5, 7, 11]: print(i) elif len(str(i)) % 2 and str(i) == str(i)[::-1]: if is_prime(i): print(i) print(-1) 소수 판정

// 9658 print('SK' if [1, 0, 1, 0, 1, 1, 1][(int(input())) % 7] else 'CY') // 9660 print('SK' if [1, 0, 1, 1, 1, 1, 0][(int(input()) - 1) % 7] else 'CY')

n = int(input()) dp = [0] * 1001 dp[1] = dp[3] = dp[4] = 1 for i in range(5, n + 1): if not min(dp[i - 1], dp[i - 3], dp[i - 4]): dp[i] = 1 print('SK' if dp[n] else 'CY') dp, 게임이론