Ural 1126. Magnetic Storms

#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<vector>
#include<set>
#include<queue>
#include<map>
#include<sstream>
#include<iostream>
using namespace std;

#define FOR(i,a,b) for(int (i)=(a);(i)<=(b);(i)++)
#define DOR(i,a,b) for(int (i)=(a);(i)>=(b);(i)--)
#define bug puts("Fuck");
#define LL long long
#define pb push_back
#define mp make_pair

#define nMax 200010
#define eps 1e-8
#define inf 0x7fffffff

int que[nMax],l,r,a[nMax];
int n,m;

int main(){
#ifndef ONLINE_JUDGE
freopen("input.txt","r",stdin);
//	freopen("output.txt","w",stdout);
#endif
while(~scanf("%d",&m)){
n=0;
while(scanf("%d",&a
),a
!=-1) n++;
l=r=0;
que[r++]=0;
for(int i=1;i<n;i++) {
if(i-que[l] >= m) l++;
while(a[que[r-1]]<a[i] && l<r) r--;
que[r++]=i;
if(i>=m-1) printf("%d\n",a[que[l]]);
}
}

return 0;
}