View Code of Problem 490

#include <stdio.h>
#include <math.h>
int pan(int *pa,int n)
{
	int i,j;
	for(i=0;i<n;i++)
		if(pa[i]-pa[i+1]>1)
		{
			j=i;
			while(j<n)
			{
				if(pa[j]<pa[i]&&pa[j]>pa[i+1])
					return 0;
				j++;
			}
		}
	return 1;
}
int main()
{
	int a[1200],b=0,c,d,e,f,g,n,i,j;
	while(scanf("%d",&n),n!=0)
	{
		if(b!=0)
			printf("\n");
		while(scanf("%d",&a[0]),a[0]!=0)
		{
			for(i=1;i<n;i++)
				scanf("%d",&a[i]);
			if(pan(a,n))
				printf("Yes\n");
			else
				printf("No\n");
		}
		b=1;
	}
	return 0;
}