https://ac.nowcoder.com/acm/contest/63746/K
题目:
滑动窗口
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 10;
int a[N], q[N];
int main()
{
int n, m;
scanf("%d%d", &n, &m);
for(int i = 0; i < n; i ++) scanf("%d", &a[i]);
int hh = 0, tt = -1;
for(int i = 0; i < n; i ++)
{
if(hh <= tt && i - m + 1 > q[hh]) hh ++;
while(hh <= tt &&a[q[tt]] >= a[i]) tt --;//单调递增序列
q[++ tt] = i;
if(i >= m - 1) printf("%d\n", a[q[hh]]);
}
return 0;
}
min_element()
int main()
{
//ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
scanf("%d%d", &n, &m);
for(int i = 1; i <= n; i ++) scanf("%d", &a[i]);
int minn = *min_element(a + 1, a + m + 1) ;
printf("%d\n", minn);
int j = 1;
for(int i = m + 1; i <= n; i ++)
{
j ++;
if(a[j - 1] == minn)
minn = *min_element(a + j, a + i + 1);
else
if(minn > a[i]) minn = a[i];
printf("%d\n", minn);
}
return 0;
}