//https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 より
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

//

fn run() {
    input! {
        w: usize,
        p: [(i64, i64, i64); w],
    }
    let mid = (w + 1) / 2;
    let (front, back) = p.split_at(mid);
    let mut dp = vec![vec![]; 3];// 最後の行動が学校、アルバイト、デート
    dp[2].push((0, 0));
    for &(a, b, c) in front.iter() {
        let mut next = vec![vec![]; 3];
        for &(p, f) in dp[0].iter() {
            next[2].push((p - c, f + b));
        }
        for &(p, f) in dp[1].iter() {
            next[0].push((p, f));
            next[1].push((p + a, f));
        }
        for &(p, f) in dp[2].iter() {
            next[0].push((p, f));
            next[1].push((p + a, f));
        }
        for next in next.iter_mut() {
            next.sort();
            let mut a: Vec<(i64, i64)> = vec![];
            for &(p, f) in next.iter() {
                if let Some(&(q, g)) = a.last() {
                    if q <= p && g <= f {
                        a.pop();
                    }
                }
                a.push((p, f));
            }
            *next = a;
        }
        dp = next;
    }
    let front_res = dp;
    let mut dp = vec![vec![]; 3];// 最初の行動が学校、アルバイト、デート
    dp[1].push((0, 0));
    dp[2].push((0, 0));
    for &(a, b, c) in back.iter().rev() {
        let mut next = vec![vec![]; 3];
        for &(p, f) in dp[0].iter() {
            next[1].push((p + a, f));
            next[2].push((p - c, f + b));
        }
        for &(p, f) in dp[1].iter() {
            next[1].push((p + a, f));
            next[2].push((p - c, f + b));
        }
        for &(p, f) in dp[2].iter() {
            next[0].push((p, f));
        }
        for next in next.iter_mut() {
            next.sort();
            let mut a: Vec<(i64, i64)> = vec![];
            for &(p, f) in next.iter() {
                if let Some(&(q, g)) = a.last() {
                    if q <= p && g <= f {
                        a.pop();
                    }
                }
                a.push((p, f));
            }
            *next = a;
        }
        dp = next;
    }
    let back_res = dp;
    let mut ans = 0;
    for (i, f) in front_res.iter().enumerate() {
        for (j, b) in back_res.iter().enumerate() {
            if i == 0 && j != 2 {
                continue;
            }
            if i != 0 && j == 2 {
                continue;
            }
            for &(a, x) in f.iter() {
                for &(b, y) in b.iter() {
                    if a + b >= 0 {
                        ans = std::cmp::max(ans, x + y);
                    }
                }
            }
        }
    }
    println!("{}", ans);
}

fn main() {
    run();
}