import os, sys
from io import BytesIO, IOBase
def Accepted():
n = int(input())
m = int(input())
ans=2
for i in range(1,n):
ans<<=1
if ans>m:
print(m)
return
print(m%ans)
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._file = file
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
if __name__ == "__main__":
tc = 1
while tc:
Accepted()
tc -= 1#include <bits/stdc++.h>
#include <iostream>
using namespace std;
typedef long long ll;
#define go() ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
const int M=1e9+7;
int add(int a,int b)
{
return (a%M+b%M)%M;
}
ll multi(ll a,ll b,ll md)
{
return (a%md*b%md)%md;
}
int power(ll x,ll n)
{
if(n==0) return 1;
ll res=power(x,n/2);
res=res*res;
if(n%2) res=res*x;
return res;
}
int main()
{
go();
ll n,m; cin>>n>>m;
if(n>30) cout<<m;
else cout<<m%power(2,n);
}1047B - Cover Points | 1381B - Unmerge |
1256A - Payment Without Change | 908B - New Year and Buggy Bot |
979A - Pizza Pizza Pizza | 731A - Night at the Museum |
742A - Arpa’s hard exam and Mehrdad’s naive cheat | 1492A - Three swimmers |
1360E - Polygon | 1517D - Explorer Space |
1230B - Ania and Minimizing | 1201A - Important Exam |
676A - Nicholas and Permutation | 431A - Black Square |
474B - Worms | 987B - High School Become Human |
1223A - CME | 1658B - Marin and Anti-coprime Permutation |
14B - Young Photographer | 143A - Help Vasilisa the Wise 2 |
320A - Magic Numbers | 1658A - Marin and Photoshoot |
514A - Chewbaсca and Number | 382A - Ksenia and Pan Scales |
734B - Anton and Digits | 1080A - Petya and Origami |
1642D - Repetitions Decoding | 1440A - Buy the String |
1658F - Juju and Binary String | 478A - Initial Bet |