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pub mod input { use std::io; pub fn int_i8() -> i8 { let mut x = String::new(); io::stdin().read_line(&mut x); let x: i8 = x.trim().parse().unwrap(); x } pub fn int_i32() -> i32 { let mut x = String::new(); io::stdin().read_line(&mut x); let x: i32 = x.trim().parse().unwrap(); x } pub fn int_i64() -> i64 { let mut x = String::new(); io::stdin().read_line(&mut x); let x: i64 = x.trim().parse().unwrap(); x } pub fn int_f32() -> f32 { let mut x = String::new(); io::stdin().read_line(&mut x); let x: f32 = x.trim().parse().unwrap(); x } pub fn int_f64() -> f64 { let mut x = String::new(); io::stdin().read_line(&mut x); let x: f64 = x.trim().parse().unwrap(); x } pub fn string() -> String { let mut x = String::new(); io::stdin().read_line(&mut x); let x: String = x.trim().parse().unwrap(); x } pub fn int_usize() -> usize { let mut x = String::new(); io::stdin().read_line(&mut x); let x: usize = x.trim().parse().unwrap(); x } }