pub mod scanner { pub struct Scanner { buf: Vec<String>, } impl Scanner { pub fn new() -> Self { Self { buf: vec![] } } pub fn new_from(source: &str) -> Self { let source = String::from(source); let buf = Self::split(source); Self { buf } } pub fn next<T: std::str::FromStr>(&mut self) -> T { loop { if let Some(x) = self.buf.pop() { return x.parse().ok().expect(""); } let mut source = String::new(); std::io::stdin().read_line(&mut source).expect(""); self.buf = Self::split(source); } } fn split(source: String) -> Vec<String> { source .split_whitespace() .rev() .map(String::from) .collect::<Vec<_>>() } } } use crate::scanner::Scanner; use std::{collections::VecDeque, io::Write}; fn main() { let mut scanner = Scanner::new(); let out = std::io::stdout(); let mut out = std::io::BufWriter::new(out.lock()); let t: usize = 1; for _ in 0..t { solve(&mut scanner, &mut out); } } fn solve(scanner: &mut Scanner, out: &mut std::io::BufWriter<std::io::StdoutLock>) { let n: usize = scanner.next(); let m: usize = scanner.next(); let mut l = (0..n).map(|_| scanner.next::<isize>()).collect::<Vec<_>>(); l.push(1e10 as isize); l.sort(); let mut fbw = (0..m) .map(|_| { ( scanner.next::<isize>(), scanner.next::<isize>(), scanner.next::<isize>(), ) }) .collect::<Vec<_>>(); fbw.sort(); let mut que = VecDeque::from(l); let mut left = -(1e10 as isize); let mut ans: isize = 0; for &(f, b, w) in fbw.iter() { while let Some(&right) = que.front() { if right <= f { que.pop_front(); left = right; } else { break; } } ans += b.max(w - (f - left)).max(w - (*que.front().unwrap() - f)); } writeln!(out, "{}", ans).unwrap(); }