#include "secret.h"
using namespace std;
#define f first
#define s second
#define pb push_back
#define ep emplace
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define uniquev(v) sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define mem(f,x) memset(f , x , sizeof(f))
#define sz(x) (int)(x).size()
#define __lcm(a, b) (1ll * ((a) / __gcd((a), (b))) * (b))
#define mxx *max_element
#define mnn *min_element
#define cntbit(x) __builtin_popcountll(x)
#define len(x) (int)(x.length())
const int N = 1e3 + 10;
int n;
int a[N], f[N][N];
void prepare(int l, int r) {
if (l > r) {
return;
}
int m = (l + r) / 2;
int val = a[m];
f[m][m] = val;
f[m + 1][m + 1] = a[m + 1];
for (int j = m + 2; j <= r; j++) {
f[m + 1][j] = Secret(f[m + 1][j - 1], a[j]);
}
for (int j = m - 1; j >= l; j--) {
f[j][m] = Secret(f[j + 1][m], a[j]);
}
prepare(l, m - 1);
prepare(m + 1, r);
}
void Init(int _n, int _a[]) {
n = _n;
for (int i = 1; i <= n; i++)
a[i] = _a[i - 1];
mem(f, -1);
prepare(1, n);
}
int get(int l, int r, int u, int v) {
int m = (l + r) / 2;
if (m >= u && m <= v) {
if (m == v) {
return f[u][m];
}
return Secret(f[u][m], f[m + 1][v]);
}
if (m > v) {
return get(l, m - 1, u, v);
}
return get(m + 1, r, u, v);
}
int query(int l, int r) {
l++, r++;
if (l == r) {
return a[l];
}
return get(1, n, l, r);
}
Compilation message
secret.cpp: In function 'void Init(int, int*)':
secret.cpp:15:25: error: 'memset' was not declared in this scope
15 | #define mem(f,x) memset(f , x , sizeof(f))
| ^~~~~~
secret.cpp:54:5: note: in expansion of macro 'mem'
54 | mem(f, -1);
| ^~~
secret.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
1 | #include "secret.h"
+++ |+#include <cstring>
2 |
