#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
vector<vector<int>> mid, v;
void dc(int l, int r, vector<int> &a) {
if (l > r) return;
int m = l + r >> 1;
v[m][m] = a[m];
if (m < r) v[m + 1][m + 1] = a[m + 1];
for (int i = l; i <= m - 1; i++)
for (int j = m + 1; j <= r; j++)
mid[i][j] = m;
for (int i = m - 1; i >= l; i--)
v[i][m] = Secret(a[i], v[i + 1][m]);
for (int i = m + 2; i <= r; i--)
v[m + 1][i] = Secret(a[i], v[m + 1][i - 1]);
dc(l, m - 1, a);
dc(m + 1, r, a);
}
void init(int n, vector<int> a) {
mid = v = vector<vector<int>> (n, vector<int> (n, -1));
dc(0, n - 1, a);
}
int query(int l, int r) {
if (v[l][r] != -1) return v[l][r];
int m = mid[l][r];
return Secret(v[l][m], v[m + 1][r]);
}
Compilation message
secret.cpp: In function 'void dc(int, int, std::vector<int>&)':
secret.cpp:9:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
9 | int m = l + r >> 1;
| ~~^~~
/usr/bin/ld: /tmp/ccNnw30G.o: in function `main':
grader-full.cpp:(.text.startup+0x2a8): undefined reference to `Init(int, int*)'
/usr/bin/ld: grader-full.cpp:(.text.startup+0x30b): undefined reference to `Query(int, int)'
collect2: error: ld returned 1 exit status
