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#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 5 , M = 1e6 + 5 , MOD = 998244353 , SQ = 316;
#define endl '\n'
#define int long long
#define Shity ios_base::sync_with_stdio(0);
#define Code cin.tie(0),cout.tie(0);
#define By int t = 1;  //cin >> t;
#define Hossam while(t--) { solve(); }
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
int dx[4] = {-1, 1, 0, 0};
int dy[4] = {0, 0, -1, 1};
 
void Free_Palestine() {
#ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("output.txt", "w", stdout);
#endif
}
 
int dp[65][2][2][2][2][2] ,l , r , tl[65] , tr[65];
 
int idk(int pos, int la, int ra, int lb, int rb, int less) {
        if (pos < 0)
            return 0;
        int &ret = dp[pos][la][ra][lb][rb][less];
        if (~ret)
            return ret;
        ret = 0;
        int st1 = la ? tl[pos] : 0;
        int end1 = ra ? tr[pos] : 1;
        int st2 = lb ? tl[pos] : 0;
        int end2 = rb ? tr[pos] : 1;
        for (int i = st1; i <= end1; i++) {
            for (int j = st2; j <= end2; j++) {
                if (!less && i > j)
                    continue;
                int nless = less;
                if (!less && i < j)
                    nless = 1;
                int nla = la && (i == tl[pos]);
                int nra = ra && (i == tr[pos]);
                int nlb = lb && (j == tl[pos]);
                int nrb = rb && (j == tr[pos]);
                ret = max(ret, ((i ^ j) << pos) + idk(pos - 1, nla, nra, nlb, nrb, nless));
            }
        }
    return ret;
}
 
void solve() {
    cin >> l >> r;
    for (int i = 0; i < 63; i++) {
        tl[i] = (l >> i) & 1;
        tr[i] = (r >> i) & 1;
    }
    memset(dp, -1, sizeof dp);
    cout << idk(62 , 1 , 1, 1 ,1,0) << endl;
}
 
int32_t main() {
  Free_Palestine();
  Shity Code By Hossam
  return 0;
}

Main.java:1: error: illegal character: '#'
#include <bits/stdc++.h>
^
Main.java:1: error: class, interface, or enum expected
#include <bits/stdc++.h>
         ^
Main.java:3: error: class, interface, or enum expected
const int N = 1e6 + 5 , M = 1e6 + 5 , MOD = 998244353 , SQ = 316;
^
Main.java:4: error: illegal character: '#'
#define endl '\n'
^
Main.java:4: error: class, interface, or enum expected
#define endl '\n'
        ^
Main.java:5: error: illegal character: '#'
#define int long long
^
Main.java:6: error: illegal character: '#'
#define Shity ios_base::sync_with_stdio(0);
^
Main.java:7: error: illegal character: '#'
#define Code cin.tie(0),cout.tie(0);
^
Main.java:7: error: class, interface, or enum expected
#define Code cin.tie(0),cout.tie(0);
        ^
Main.java:8: error: illegal character: '#'
#define By int t = 1;  //cin >> t;
^
Main.java:8: error: class, interface, or enum expected
#define By int t = 1;  //cin >> t;
        ^
Main.java:9: error: illegal character: '#'
#define Hossam while(t--) { solve(); }
^
Main.java:9: error: class, interface, or enum expected
#define Hossam while(t--) { solve(); }
        ^
Main.java:9: error: class, interface, or enum expected
#define Hossam while(t--) { solve(); }
                                     ^
Main.java:10: error: illegal character: '#'
#define all(x) begin(x), end(x)
^
Main.java:11: error: illegal character: '#'
#define rall(x) rbegin(x), rend(x)
^
Main.java:13: error: class, interface, or enum expected
int dy[4] = {0, 0, -1, 1};
^
Main.java:15: error: class, interface, or enum expected
void Free_Palestine() {
^
Main.java:16: error: illegal character: '#'
#ifndef ONLINE_JUDGE
^
Main.java:18: error: class, interface, or enum expected
  freopen("output.txt", "w", stdout);
  ^
Main.java:19: error: illegal character: '#'
#endif
^
Main.java:20: error: class, interface, or enum expected
}
^
Main.java:24: error: class, interface, or enum expected
int idk(int pos, int la, int ra, int lb, int rb, int less) {
^
Main.java:27: error: class, interface, or enum expected
        int &ret = dp[pos][la][ra][lb][rb][less];
        ^
Main.java:28: error: class, interface, or enum expected
        if (~ret)
        ^
Main.java:30: error: class, interface, or enum expected
        ret = 0;
        ^
Main.java:31: error: class, interface, or enum expected
        int st1 = la ? tl[pos] : 0;
        ^
Main.java:32: error: class, interface, or enum expected
        int end1 = ra ? tr[pos] : 1;
        ^
Main.java:33: error: class, interface, or enum expected
        int st2 = lb ? tl[pos] : 0;
        ^
Main.java:34: error: class, interface, or enum expected
        int end2 = rb ? tr[pos] : 1;
        ^
Main.java:35: error: class, interface, or enum expected
        for (int i = st1; i <= end1; i++) {
        ^
Main.java:35: error: class, interface, or enum expected
        for (int i = st1; i <= end1; i++) {
                          ^
Main.java:35: error: class, interface, or enum expected
        for (int i = st1; i <= end1; i++) {
                                     ^
Main.java:36: error: class, interface, or enum expected
            for (int j = st2; j <= end2; j++) {
                              ^
Main.java:36: error: class, interface, or enum expected
            for (int j = st2; j <= end2; j++) {
                                         ^
Main.java:39: error: class, interface, or enum expected
                int nless = less;
                ^
Main.java:40: error: class, interface, or enum expected
                if (!less && i < j)
                ^
Main.java:42: error: class, interface, or enum expected
                int nla = la && (i == tl[pos]);
                ^
Main.java:43: error: class, interface, or enum expected
                int nra = ra && (i == tr[pos]);
                ^
Main.java:44: error: class, interface, or enum expected
                int nlb = lb && (j == tl[pos]);
                ^
Main.java:45: error: class, interface, or enum expected
                int nrb = rb && (j == tr[pos]);
                ^
Main.java:46: error: class, interface, or enum expected
                ret = max(ret, ((i ^ j) << pos) + idk(pos - 1, nla, nra, nlb, nrb, nless));
                ^
Main.java:47: error: class, interface, or enum expected
            }
            ^
Main.java:50: error: class, interface, or enum expected
}
^
Main.java:54: error: class, interface, or enum expected
    for (int i = 0; i < 63; i++) {
    ^
Main.java:54: error: class, interface, or enum expected
    for (int i = 0; i < 63; i++) {
                    ^
Main.java:54: error: class, interface, or enum expected
    for (int i = 0; i < 63; i++) {
                            ^
Main.java:56: error: class, interface, or enum expected
        tr[i] = (r >> i) & 1;
        ^
Main.java:57: error: class, interface, or enum expected
    }
    ^
Main.java:59: error: class, interface, or enum expected
    cout << idk(62 , 1 , 1, 1 ,1,0) << endl;
    ^
Main.java:60: error: class, interface, or enum expected
}
^
Main.java:64: error: class, interface, or enum expected
  Shity Code By Hossam
  ^
Main.java:66: error: class, interface, or enum expected
}
^
53 errors

Standard output is empty