C++ :

#include <iostream>
using namespace std;
int i,j,a[200][200],n,b[200][200];
int main()
{
      cin>>n;
      for (i=1;i<=n;i++) for (j=1;j<=i;j++) cin>>a[i][j];
      for (i=n;i>=1;i--)
      {
          for (j=1;j<=i;j++)
          {
              if (b[i+1][j]>b[i+1][j+1]) b[i][j]=b[i+1][j]+a[i][j];
              else b[i][j]=b[i+1][j+1]+a[i][j];
          }
      } 
      cout<<b[1][1];
      return 0;
}