fn main() {
    let mut ni = String::new();
    std::io::stdin().read_line(&mut ni).ok();
    let ni: Vec<usize> = ni.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = ni[0];
    let t = ni[1];
    let items = (0..n).map(|_| {
            let mut temp = String::new();
            std::io::stdin().read_line(&mut temp).ok();
            let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
            (temp[0], temp[1])
        })
        .collect::<Vec<_>>();

    let mut dp = vec![vec![0usize; t+1]; n+1];
    for i in 0..n {
        let (s, a) = items[i];
        for j in 0..=t {
            dp[i+1][j] = dp[i+1][j].max(dp[i][j]);
            if j+s <= t {
                dp[i+1][j+s] = dp[i+1][j+s].max(dp[i][j] + a);
            }
        }
    }
    println!("{}", dp[n][t]);
}