#include<bits/stdc++.h>
#include "secret.h"
#define ll long long
const int nmax = 1e3+ 5;
using namespace std;
int n, a[nmax];
int L[1 << 11][nmax], R[1 << 11][nmax];
//int Secret(int a, int b){
// if(a > b) swap(a, b);
// if(a == 4 && b == 7) return 10;
// if(a == 1 && b == 10) return 11;
// if(a == 2 && b == 11) return 13;
// return 0;
//}
void build(int id, int l, int r){
if(l == r)return;
int mid = r + l >> 1;
L[id][mid] = a[mid];
R[id][mid + 1] = a[mid + 1];
for(int i = mid - 1; i >= l; --i) L[id][i] = Secret(L[id][i + 1], a[i]);
for(int i = mid + 2; i <= r; ++i) R[id][i] = Secret(R[id][i - 1], a[i]);
build(id << 1, l, mid);
build(id << 1 | 1, mid + 1, r);
}
int get(int id, int l, int r, int u, int v){
if(u == v) return a[u];
if(l > v || r < u) return 0
int mid = r + l >> 1;
if (v == mid) return L[id][u];
if(u == mid + 1) return R[id][v];
if(u <= mid && mid + 1 <= v){
return Secret(L[id][u], R[id][v]);
}
return get(id << 1, l, mid, u, v) + get(id << 1 | 1, mid + 1, r, u, v);
}
void Init(int NA, int A[]){
n = NA;
for(int i = 1; i <= n; ++i) a[i] = A[i - 1];
build(1, 1, n);
}
int Query(int a, int b){
++a, ++b;
return get(1, 1, n, a, b);
}
Compilation message
secret.cpp: In function 'void build(int, int, int)':
secret.cpp:21:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
21 | int mid = r + l >> 1;
| ~~^~~
secret.cpp: In function 'int get(int, int, int, int, int)':
secret.cpp:32:32: error: expected ';' before 'int'
32 | if(l > v || r < u) return 0
| ^
| ;
33 |
34 | int mid = r + l >> 1;
| ~~~
secret.cpp:34:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
34 | int mid = r + l >> 1;
| ~~^~~
