#[allow(unused_imports)]
use proconio::{
    input,
    marker::{Bytes, Chars, Usize1},
};
use std::collections::BinaryHeap;

fn main() {
    input! {
        n: usize,
    }
    let mut base = 0;
    let mut vl = vec![];
    let mut vr = vec![];
    for _ in 0..n {
        input! {
            c: usize,
            x: usize,
            y: usize,
        }
        if x >= y {
            base += y;
            if c != n {
                vr.push((c, x - y));
            }
        } else {
            base += x;
            if c != 0 {
                vr.push((n - c, y - x));
            }
        }
    }
    vl.sort_unstable();
    vr.sort_unstable();
    let mut res = 0;
    for mut v in [vl, vr] {
        let mut sum = 0;
        let mut pq = BinaryHeap::new();
        for d in (0..v.len()).rev() {
            while v.len() > 0 && v.last().unwrap().0 >= d {
                if v.last().unwrap().0 == d {
                    pq.push(v.pop().unwrap().1);
                } else {
                    break;
                }
            }
            sum += pq.pop().unwrap_or_default();
        }
        res += sum;
    }
    println!("{}", base + res);
}