czcyf @ 2022-07-21 19:29:45
rt,单调队列已经AC了,就是想用RMQ试试,然后就逝世了……
#include <bits/stdc++.h>
using namespace std;
const int N=1e6+10;
int maxn[N][25],minn[N][25];
int main()
{
int n,k;
cin >> n >> k;
for (int i=1;i<=n;i++)
{
cin >> maxn[i][0];
minn[i][0]=maxn[i][0];
}
for (int j=1;(1<<j)<=n;j++)
{
for (int i=1;i+(1<<j-1)<=n;i++)
{
maxn[i][j]=max(maxn[i][j-1],maxn[i+(1<<j-1)][j-1]);
minn[i][j]=min(minn[i][j-1],minn[i+(1<<j-1)][j-1]);
}
}
for (int i=1;i<=n-k+1;i++)
{
int l=i,r=i+k-1;
int kk=log2(k);
cout << min(minn[l][kk],minn[r-(1<<kk)+1][kk]) << " ";
}
cout << endl;
for (int i=1;i<=n-k+1;i++)
{
int l=i,r=i+k-1;
int kk=log2(k);
cout << max(maxn[l][kk],maxn[r-(1<<kk)+1][kk]) << " ";
}
cout << endl;
return 0;
}
by dxy2020 @ 2022-07-21 19:32:04
用一个数组,算两次。
少一倍空间。