26 lines
390 B
C++

#include<cmath>
#include<cstdlib>
#include<cstdio>
#include<iostream>
using namespace std;
int a[1000][1000];
int main()
{
int i,j,k,n,m;
cin>>n;
for (i=1;i<=n;i++)
for (j=1;j<=i;j++)
cin>>a[i][j];
for (i=n;i>0;i--)
for (j=1;j<=i;j++)
if (a[i+1][j]>=a[i+1][j+1])
{
a[i][j]=a[i][j]+a[i+1][j];
}
else
{
a[i][j]=a[i][j]+a[i+1][j+1];
}
cout<<a[1][1];
return 0;
}