# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
293355 | XmtosX | Secret (JOI14_secret) | C++17 | 510 ms | 8376 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>;
#include "secret.h"
using namespace std;
#define LL pos*2+1
#define RR pos*2+2
const int NN=1e3+3;
int a[NN],n,ans[NN][NN],l,r;
void solve(int st,int en)
{
if (st>en)
return;
int mid=(st+en)/2;
ans[mid][mid]=a[mid];
ans[mid+1][mid+1]=a[mid+1];
ans[mid][mid+1]=Secret(a[mid],a[mid+1]);
for (int i=mid+2;i<=en;i++)
ans[mid+1][i]=Secret(ans[mid+1][i-1],a[i]);
for (int i=mid-1;i>=st;i--)
ans[i][mid]=Secret(a[i],ans[i+1][mid]);
solve(st,mid-1);
solve(mid+1,en);
}
int query(int st,int en)
{
int mid=(st+en)/2;
if (mid>r)
return query(st,mid-1);
if (mid<l)
return query(mid+1,en);
return Secret(ans[l][mid],ans[mid+1][r]);
}
void Init(int N, int A[])
{
n=N;
for (int i=0;i<n;i++)
a[i]=A[i];
solve(0,n-1);
}
int Query(int L, int R)
{
l=L;
r=R;
return query(0,n-1);
}
/*
8
1 4 7 2 5 8 3 6
4
0 3
1 7
5 5
2 4
*/
Compilation message (stderr)
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