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了解更多栈的知识,
#include#include typedef struct node{ int date; node * next;}SeqStack ;SeqStack * init_SeqStack(SeqStack * top){ top=NULL; return top;}int is_Empty(SeqStack * top){ if(top==NULL)return 1; else return 0;}SeqStack * push_Stack(SeqStack * top){ SeqStack * New; New=(SeqStack *)malloc(sizeof(SeqStack)); printf("请输入要入栈的元素\n"); scanf("%d",&New->date); New->next=top; top=New; return top;}SeqStack * pop_Stack(SeqStack * top,int &m){ SeqStack * p=NULL; if(!is_Empty(top)){ m=top->date; p=top; top=top->next; free(p); return top; }}SeqStack * top_Stack(SeqStack * top,int &m){ if(!is_Empty(top)){ m= top->date; return top; }}int main(){ int m=0; SeqStack * s=NULL; init_SeqStack(s); s=push_Stack(s); s=push_Stack(s); s=push_Stack(s); s=push_Stack(s); s=top_Stack(s,m); printf("%d\n",m); s=top_Stack(s,m); printf("%d\n",m); s=pop_Stack(s,m); printf("%d\n",m); s=top_Stack(s,m); printf("%d\n",m); if(is_Empty(s)) printf("栈现在是空了"); system("pause"); return 0;}
//顺序栈的初始化,建立,插入,查找,删除。 //
//Author:Wang Yong //
//Date: 2010.8.19 //
#include <stdio.h>
#include <stdlib.h>
#define MAX 100 //定义最大栈容量
typedef
int
ElemType;
///
//定义栈类型
typedef
struct
{
ElemType data[MAX];
int
top;
}SeqStack;
///
//栈的初始化
SeqStack SeqStackInit()
{
SeqStack s;
s.top = -1;
return
s;
}
///
//判断栈空的算法
int
SeqStackIsEmpty(SeqStack s)
{
if
(s.top == -1)
return
0;
else
return
1;
}
///
//进栈的算法
void
SeqStackPush(SeqStack &s,ElemType x)
{
if
(s.top == MAX-1)
//进栈的时候必须判断是否栈满
printf
(
"stack full\n"
);
s.top++;
s.data[s.top] = x;
}
//
//出栈的算法
ElemType SeqStackPop(SeqStack &s)
{
if
(s.top == -1)
//出栈的时候必须判断是否栈空
printf
(
"stack empty\n"
);
ElemType x;
x = s.data[s.top];
s.top--;
return
x;
}
//
int
main()
{
SeqStack stack;
stack = SeqStackInit();
printf
(
"请输入进栈的元素:"
);
ElemType x;
while
(
scanf
(
"%d"
,&x) != -1)
{
SeqStackPush(stack,x);
}
printf
(
"出栈的结果:"
);
while
(stack.top != -1)
{
printf
(
"%d "
,SeqStackPop(stack));
}
printf
(
"\n"
);
return
0;
}
There is a famous railway station in PopPush City. Country there is incredibly hilly. The station was built in last century. Unfortunately, funds were extremely limited that time. It was possible to establish only a surface track. Moreover, it turned out that the station could be only a dead-end one (see picture) and due to lack of available space it could have only one track.
The local tradition is that every train arriving from the direction A continues in the direction B with coaches reorganized in some way. Assume that the train arriving from the direction A has coaches numbered in increasing order . The chief for train reorganizations must know whether it is possible to marshal coaches continuing in the direction B so that their order will be . Help him and write a program that decides whether it is possible to get the required order of coaches. You can assume that single coaches can be disconnected from the train before they enter the station and that they can move themselves until they are on the track in the direction B. You can also suppose that at any time there can be located as many coaches as necessary in the station. But once a coach has entered the station it cannot return to the track in the direction A and also once it has left the station in the direction B it cannot return back to the station.
The input file consists of blocks of lines. Each block except the last describes one train and possibly more requirements for its reorganization. In the first line of the block there is the integer N described above. In each of the next lines of the block there is a permutation of The last line of the block contains just 0.
The last block consists of just one line containing 0.
The output file contains the lines corresponding to the lines with permutations in the input file. A line of the output file contains Yes if it is possible to marshal the coaches in the order required on the corresponding line of the input file. Otherwise it contains No. In addition, there is one empty line after the lines corresponding to one block of the input file. There is no line in the output file corresponding to the last ``null'' block of the input file.
51 2 3 4 55 4 1 2 3066 5 4 3 2 100
YesNoYes
题意:给定一串连续的数,放入一个栈中,看接收的数据能否按照某种顺序输出,eg:1 2 3 4 5---->5 4 3 2 1 两种思路:
|
考虑栈为空
#include#include using namespace std;const int MAXN=1010;int n,a[MAXN];int main() { while(~scanf("%d",&n)&&n!=0) {//火车量 stack s; int flag; while(~scanf("%d",&a[0])&&a[0]!=0) {//车厢序号不能为0 while(!s.empty())s.pop(); for(int i=1; i
考虑出栈的个数
#include#include using namespace std;const int MAXN=1000+10;int n,a[MAXN];int main() { while(~scanf("%d",&n)&&n!=0) {//火车量 stack s; while(~scanf("%d",&a[0])&&a[0]!=0) {//车厢序号不能为0 for(int i=1; i
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