#include <iostream>
using namespace std;
int main()
{
cin >> n;
for(int i=1; i<=n; i++)
for(int j=1; j<=n; j++)
if(i 1 || j 1) v[i][j] = i + j;
else v[i][j] = v[i-1][j] + v[i][j-1];
#include <iostream>
using namespace std;
int main()
{
cin >> n;
for(int i=1; i<=n; i++)
for(int j=1; j<=n; j++)
if(i 1 || j 1) v[i][j] = i + j;
else v[i][j] = v[i-1][j] + v[i][j-1];