#![allow(unused)] use proconio::{marker::Usize1, *}; use std::collections::*; fn main() { input!{ n: usize, q: usize, a: [usize; n] } let dic = { let mut dic: HashMap> = HashMap::new(); for (idx, ai) in a.iter().enumerate() { let tmp = divisors(*ai); for di in tmp { dic.entry(di).or_default().push(idx); } } dic }; for _ in 0..q { input! { l: Usize1, r: Usize1, k: usize } let cnt = dic.get(&k); match cnt { Some(cnt) => { let idx_l = cnt.lower_bound(l); let idx_r = cnt.upper_bound(r); println!("{}", idx_r-idx_l); }, None => println!("0") } } } pub trait BinarySearch { fn lower_bound(&self, key: T) -> usize; fn upper_bound(&self, key: T) -> usize; } impl BinarySearch for [T] where T: Ord, { fn lower_bound(&self, key: T) -> usize { let mut ng = -1 as isize; let mut ok = self.len() as isize; while ok - ng > 1 { let mid = (ok + ng) / 2; if key <= self[mid as usize] { ok = mid; } else { ng = mid; } } ok as usize } fn upper_bound(&self, key: T) -> usize { let mut ng = -1 as isize; let mut ok = self.len() as isize; while ok - ng > 1 { let mid = (ok + ng) / 2; if key < self[mid as usize] { ok = mid; } else { ng = mid; } } ok as usize } } fn divisors(x: usize) -> Vec { let mut ret = vec![]; for i in 1..=x { if i*i > x { break; } if x%i == 0 { ret.push(i); } else { continue; } if i*i != x { ret.push(x/i); } } ret }