3173.cpp

这些是我到目前在PKU上做出的题目

#include <iostream.h>

int a[21][21],n,s,i,j;

int main()
{
	cin>>n>>s;
	for (i=1;i<=n;i++)
		for (j=1;j<=i;j++)
		{
			a[j][i]=s;
			s++;
			if (s>9)
				s=1;
		}
	for (i=1;i<=n;i++)
	{
		for (j=2;j<=i;j++)
			cout<<"  ";
		for (j=i;j<=n-1;j++)
			cout<<a[i][j]<<" ";
		cout<<a[i][n]<<"\n";
	}
	return 0;
}