#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

constexpr int M = 5010;
ll dp[3][M], ndp[3][M];

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  constexpr long long INF = 1002003004005006007;
  rep(i, 3) rep(j, M) dp[i][j] = -INF;
  rep(i, 3) dp[i][0] = 0;
  rep(step, n) {
    int a[3];
    rep(i, 3) cin >> a[i];
    rep(i, 3) rep(j, M) ndp[i][j] = -INF;
    rep(i, 3) rep(j, M) {
      rep(ni, 3) if (ni != i) {
        int atc = j + a[ni];
        ll dmg = dp[i][j];
        int over = max(atc - (M - 1), 0);
        dmg += over * ll(n - step);
        atc -= over;
        chmax(ndp[ni][max(0, atc - 1)], dmg + atc);
      }
    }
    memcpy(dp, ndp, sizeof(dp));
  }
  ll ans = 0;
  rep(i, 3) rep(j, M) chmax(ans, dp[i][j]);
  cout << ans << '\n';
}