func_code_string: #include <bits/stdc++.h>   using namespace std;   int N;   int A[5005];   int DP[5005][5005];   void Read() {     scanf( %d , &N);     for (int i = 1; i <= N; i++) scanf( %d , &A[i]);   }   void precalcDP() {     for (int i = 1; i <= N; i++) {       for (int j = i; j <= N; j++) DP[i][j - i] = A[j];       for (int k = 0; (1 << k) <= N; k++)         for (int j = 0; j < N; j++)           if ((j & (1 << k)) != 0) DP[i][j] ^= DP[i][j ^ (1 << k)];     }     for (int j = 1; j <= N; j++) {       for (int i = 1; j + i <= N; i++)         DP[i][j] = max(DP[i][j], max(DP[i][j - 1], DP[i + 1][j - 1]));     }   }   void Query(int a, int b) {     int dist = b - a;     printf( %d n , DP[a][dist]);   }   int main() {     Read();     precalcDP();     int Q;     scanf( %d , &Q);     for (int i = 1; i <= Q; i++) {       int x, y;       scanf( %d%d , &x, &y);       Query(x, y);     }     return 0;   }   