#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#define x first
#define y second
#define ld long double
#define ll long long
#define ull unsigned long long
#define us unsigned short
#define lsb(x) ((x) & (-(x)))
using namespace std;
int n;
int v[1005], sum[1005][1005];
int Secret(int x, int y) {
return x ^ y;
}
void divide(int st, int dr) {
if(st == dr) {
sum[st][st] = v[st];
return;
}
int mid = (st + dr) >> 1;
sum[mid][mid] = v[mid];
for(int i = mid - 1; i >= st; i--)
sum[i][mid] = Secret(sum[i + 1][mid], v[i]);
if(mid < n - 1)
sum[mid + 1][mid + 1] = v[mid + 1];
for(int i = mid + 2; i <= dr; i++)
sum[mid + 1][i] = Secret(sum[mid + 1][i - 1], v[i]);
}
void init(int N, int a[]) {
n = N;
for(int i = 0; i < n; i++)
v[i] = a[i];
divide(0, n - 1);
}
int solve(int st, int dr, int l, int r) {
int mid = (st + dr) >> 1;
if(l <= mid && mid <= r) {
if(l == mid || mid == r)
return sum[l][r];
else
return Secret(sum[l][mid], sum[mid + 1][r]);
}
if(r < mid)
return solve(st, mid, l, r);
return solve(mid + 1, dr, l, r);
}
int Query(int l, int r) {
if(l == r)
return v[l];
return solve(0, n - 1, l, r);
}
/*int main() {
ios_base :: sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n, Q, l, r, a[10005];
cin >> n;
for(int i = 0; i < n; i++)
cin >> a[i];
init(n, a);
cin >> Q;
for(; Q; Q--) {
cin >> l >> r;
cout << Query(l, r) << "\n";
int s = v[l];
for(int i = l + 1; i <= r; i++)
s = Secret(s, v[i]);
cout << s << " right answer\n";
}
return 0;
}*/
Compilation message
/tmp/ccpd2Oix.o: In function `Secret(int, int)':
secret.cpp:(.text+0x0): multiple definition of `Secret(int, int)'
/tmp/ccfrHfNN.o:grader-full.cpp:(.text+0x2d0): first defined here
/tmp/ccfrHfNN.o: In function `main':
grader-full.cpp:(.text.startup+0x298): undefined reference to `Init(int, int*)'
collect2: error: ld returned 1 exit status
