/*
* @Author: qin_peng
* @Date: 2018-08-25 09:10:10
* @Last Modified by: qin_peng
* @Last Modified time: 2018-08-29 11:08:38
*/
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
struct que
{
int *head,*tail;
};
bool empty(que *q){return q->head==q->tail;}
int size(que *q){return q->tail-q->head;}
void build(que *q,int n)
{
q->head=(int *)malloc(sizeof(int));
q->tail=q->head;
}
void push(que *q,int val){*q->tail++=val;}
int pop(que *q)
{
if(empty(q))return -1;
return *q->head++;
}
int front(que *q)
{
if(empty(q))return -1;
return *q->head;
}
int main()
{
que q;
build(&q,5);
for(int i=0;i<5;i++)
{
int x;cin>>x;
push(&q,x);
}
while(!empty(&q))cout<<pop(&q)<<endl;
}
队列2
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define Status int
#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2
typedef struct QNode
{
int data;
struct QNode *next;
}QNode,*QueuePtr;
typedef struct
{
QueuePtr front;
QueuePtr rear;
}LinkQueue;
struct QUEUE
{
Status InitQueue(LinkQueue &Q)
{
Q.front=Q.rear=(QueuePtr)malloc(sizeof(QNode));
if(!Q.front)exit(OVERFLOW);
return OK;
}
Status DestroyQueue(LinkQueue &Q)
{
while(Q.front)
{
Q.rear=Q.front->next;
free(Q.front);
Q.front=Q.rear;
}return OK;
}
Status EnQueue(LinkQueue &Q,int e)
{
QueuePtr p;
p=(QueuePtr)malloc(sizeof(QNode));
if(!p)exit(OVERFLOW);
p->data=e;p->next=NULL;
Q.rear->next=p;
Q.rear=p;return OK;
}
Status DeQueue(LinkQueue &Q,int &e)
{
if(Q.front==Q.rear)return ERROR;
QueuePtr p;
p=Q.front->next;
e=p->data;
Q.front->next=p->next;
if(Q.rear==p)Q.rear=Q.front;
free(p);
return OK;
}
Status Empty(LinkQueue Q)
{
return Q.rear==Q.front;
}
};
int main()
{
QUEUE qu;
LinkQueue Q;
qu.InitQueue(Q);
for(int i=0,e;i<5;i++)
{
cin>>e;
qu.EnQueue(Q,e);
}
while(!qu.Empty(Q))
{
int e;qu.DeQueue(Q,e);
cout<<e<<" ";
}puts("");
}
循环队列
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define Status int
#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2
#define MAXSIZE 100
typedef struct
{
int *base;
int front ,rear;
}SqQueue;
struct QUEUE
{
Status InitQueue(SqQueue &Q)
{
Q.base=(int *)malloc(MAXSIZE*sizeof(int));
if(!Q.base)exit(OVERFLOW);
Q.front=Q.rear=0;
return OK;
}
Status QueueLength(SqQueue &Q)
{
return (Q.rear-Q.front+MAXSIZE)%MAXSIZE;
}
Status EnQueue(SqQueue &Q,int r)
{
if((Q.rear+1)%MAXSIZE==Q.front)return ERROR;
Q.base[Q.rear]=r;
Q.rear=(Q.rear+1)%MAXSIZE;
return OK;
}
Status DeQueue(SqQueue &Q,int &e)
{
if(Q.front==Q.rear)return ERROR;
e=Q.base[Q.front];
Q.front=(Q.front+1)%MAXSIZE;
return OK;
}
Status QueueTravel(SqQueue Q)
{
for(int i=0;i<Q.rear;i++)
{
cout<<Q.base[i]<<" " ;
}puts("");
}
};
int main()
{
QUEUE qu;
SqQueue Q;
qu.InitQueue(Q);
for(int i=0;i<5;i++)
{
int e;cin>>e;
qu.EnQueue(Q,e);
}
qu.QueueTravel(Q);
}
单调队列
#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cstring>
#include<string>
using namespace std;
#define N 1000005
int n,k;
int minn[N],maxx[N];
int a[N];
struct qin
{
int num,index;
};
qin Q[N],P[N];
void getmax()
{
int head=1,tail=0;
for(int i=0;i<n;i++)
{
while(head<=tail&&Q[tail].num<a[i])tail--;
tail++;Q[tail].num=a[i];Q[tail].index=i;
if(i>=k-1)
{
while(Q[head].index<=i-k)head++;
maxx[i-k+1]=Q[head].num;
}
}
}
void getmin()
{
int head=1,tail=0;
for(int i=0;i<n;i++)
{
while(head<=tail&&P[tail].num>a[i])tail--;
tail++;P[tail].num=a[i];P[tail].index=i;
if(i>=k-1)
{
while(P[head].index<=i-k)head++;
minn[i-k+1]=P[head].num;
}
}
}
int main()
{
while(cin>>n>>k)
{
for(int i=0;i<n;i++)scanf("%d",a+i);
getmax();getmin();
for(int i=0;i<=n-k;i++)printf("%d%c",minn[i]," \n"[i==n-k]);
for(int i=0;i<=n-k;i++)printf("%d%c",maxx[i]," \n"[i==n-k]);
}
}
/*
#include <iostream>
#include <cstdio>
#include <queue>
#include <deque>
using namespace std;
typedef pair<int, int> P;
#define maxn 1000000 + 10
deque<P> Q1;
deque<P> Q2;
int n, k;
int Min[maxn], Max[maxn];
int main()
{
while(~scanf("%d%d", &n, &k))
{
while(!Q1.empty()) Q1.pop_back();
while(!Q2.empty()) Q2.pop_back();
int x;
for(int i=1; i<=n; i++)
{
scanf("%d", &x);
while(!Q1.empty() && Q1.back().first >= x) Q1.pop_back();
Q1.push_back(P(x, i));
if(i >= k)
{
while(!Q1.empty() && Q1.front().second <= i-k) Q1.pop_front();
Min[i] = Q1.front().first;
}
while(!Q2.empty() && Q2.back().first <= x) Q2.pop_back();
Q2.push_back(P(x, i));
if(i >= k)
{
while(!Q2.empty() && Q2.front().second <= i-k) Q2.pop_front();
Max[i] = Q2.front().first;
}
}
for(int i=k; i<=n; i++)
i == n ? printf("%d\n", Min[i]) : printf("%d ", Min[i]);
for(int i=k; i<=n; i++)
i == n ? printf("%d\n", Max[i]) : printf("%d ", Max[i]);
}
return 0;
}
*////
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