func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long int md = 1e9 + 7;   const long long int N = 55;   long long int a[N];   long long int dp[N][N];   vector<pair<long long int, long long int>> v;   long long int mask;   long long int rec(long long int n, long long int k) {     long long int s = 0;     if (dp[n][k] != -1) return dp[n][k];     v.emplace_back(pair<long long int, long long int>{n, k});     if (k == 1) {       for (long long int i = 1; i <= n; i++) s += a[i];       return dp[n][k] = ((s & mask) == mask);     }     for (long long int i = n; i >= k; i--) {       s += a[i];       if ((s & mask) == mask)         if (rec(i - 1, k - 1)) return dp[n][k] = 1;     }     return dp[n][k] = 0;   }   signed main() {     ios::sync_with_stdio(0);     long long int n, k;     cin >> n >> k;     for (long long int i = 1; i <= n; i++) cin >> a[i];     long long int ans = 0;     long long int c = pow(2, 56);     for (long long int i = 0; i < N; i++)       for (long long int j = 0; j < N; j++) dp[i][j] = -1;     for (long long int i = 56; i >= 0; i--) {       mask = ans + c;       if (rec(n, k)) ans += c;       c >>= 1;       for (auto it : v) dp[it.first][it.second] = -1;       v.clear();     }     cout << ans;     return 0;   }   