#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
int b[1000][1000], n;
void PreCalc(int lx, int rx){
if(rx-lx<=2) return;
int mx = (lx+rx)/2;
PreCalc(lx, mx);
PreCalc(mx, rx);
for(int i=mx-2; i>=0; --i)
b[i][mx-1] = Secret(a[i], b[i+1][mx-1]);
for(int i=mx+1; i<rx; ++i)
b[mx][i] = Secret(b[mx][i-1], a[i]);
}
void Init(int N, int a[]){
n = N;
for(int i=0; i<1000; ++i)
for(int j=0; j<1000; ++j)
b[i][j] = i-j ? -1 : a[i];
PreCalc(0, n);
}
int Calc(int l, int r, int lx, int rx){
int mx = (lx+rx)/2;
if(r<mx) return Calc(l, r, lx, mx);
if(l>=mx) return Calc(l, r, mx, rx);
return Secret(b[l][mx-1], b[mx][r]);
}
int Query(int L, int R){
if(L==R) return b[L][L];
if(L+1==R) return Secret(b[L][L], b[R][R]);
return Calc(L, R, 0, n);
}
Compilation message
secret.cpp: In function 'void PreCalc(int, int)':
secret.cpp:14:23: error: 'a' was not declared in this scope
14 | b[i][mx-1] = Secret(a[i], b[i+1][mx-1]);
| ^
secret.cpp:16:33: error: 'a' was not declared in this scope
16 | b[mx][i] = Secret(b[mx][i-1], a[i]);
| ^
