数论-北大-1163

[china_sjc]

#include<stdio.h>
int main()
{
int a[101][101];
int i,j,k,n;
scanf("%d",&n);
for(i=1;i<=n;i++)
for(j=1;j<=i;j++)scanf("%d",&a[i][j]);
for(i=n-1;i>=1;i--)
for(j=1;j<=i;j++)
{
if(a[i+1][j]>a[i+1][j+1])a[i][j]+=a[i+1][j];
else a[i][j]+=a[i+1][j+1];
}
printf("%d\n",a[1][1]);
return 0;
}