1 #include <stdio.h> 2 int main () 3 { 4     int n,i,j,a[30][30]; 5     while (scanf("%d",&n)!=EOF) 6     { 7         for (i=0; i<n; i++) 8             a[i][0]=a[i][i]=1; 9         for (i=2; i<n; i++)10         {11             for (j=1; j<i; j++)12             {13                 a[i][j]=a[i-1][j]+a[i-1][j-1];14             }15         }16         for (i=0; i<n; i++)17         {18             for (j=0; j<=i; j++)19             {20                 if(i==j)21                     printf ("%d",a[i][j]);22                 else printf("%d ",a[i][j]);23             }24             printf ("\n");25         }26         printf ("\n");27     }28 }