POJ 1363 Rails(模拟栈)

#include<iostream>
#include<stdio.h>
using namespace std;
int n,a[1005],i;
bool ok()
{
int mystack[1005],num=0,i,k=1;
for (i=1;i<=n;i++)
{
mystack[++num]=i;
while (num && a[k]==mystack[num])
{
num--;
k++;
}
}
if (num) return false;
else  return true;
}
int main()
{
int p=0;
scanf("%d",&n);
while (n)
{
if (p) printf("\n");
p++;
scanf("%d",&a[1]);
while (a[1])
{
for (i=2;i<=n;i++) scanf("%d",&a[i]);
if (ok()) printf("Yes\n"); else printf("No\n");
scanf("%d",&a[1]);
}
scanf("%d",&n);
}
return 0;
}