A. flip
import sys
def solve():
input = sys.stdin.readline
mod = 10 ** 9 + 7
print("".join(["0" if v != "0" else "1" for v in str(input().rstrip('\n'))]))
if __name__ == '__main__':
solve()
B. V
import sys
def func(n, a, ls):
if n in a:
ls += [n]
return func(n + 1, a, ls)
else:
ls += [n]
ls.reverse()
return ls
def solve():
input = sys.stdin.readline
mod = 10 ** 9 + 7
n, m = list(map(int, input().rstrip('\n').split()))
a = list(map(int, input().rstrip('\n').split()))
ans = []
for i in range(n):
if i + 1 not in ans:
ans += func(i + 1, a, [])
print(*ans)
if __name__ == '__main__':
solve()
C. Coverage
import sys
import itertools
def solve():
input = sys.stdin.readline
mod = 10 ** 9 + 7
n, m = list(map(int, input().rstrip('\n').split()))
a = []
for i in range(m):
c = int(input().rstrip('\n'))
a.append(sum([pow(2, v-1) for v in list(map(int, input().rstrip('\n').split()))]))
p = pow(2, n) - 1
ans = 0
for i in range(m + 1):
for v in itertools.combinations(a, i):
b = 0
for j in range(i):
b |= v[j]
if b == p:
ans += 1
print(ans)
if __name__ == '__main__':
solve()
D. Step Up Robot
import sys
import collections
def solve():
input = sys.stdin.readline
mod = 10 ** 9 + 7
n = int(input().rstrip('\n'))
a = list(map(int, input().rstrip('\n').split()))
m = int(input().rstrip('\n'))
b = list(map(int, input().rstrip('\n').split()))
d = collections.defaultdict(int)
for v in b:
d[v]
x = int(input().rstrip('\n'))
dp = [False] * (x + 1)
dp[0] = True
for i in range(x + 1):
if dp[i]:
for v in a:
if i + v < x + 1:
if i + v not in d:
dp[i + v] = True
print("Yes" if dp[x] else "No")
if __name__ == '__main__':
solve()