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016 ok

master
Coin de Gamma 1 year ago
parent
commit
b271920131
  1. 54
      016/main.rs

54
016/main.rs

@ -0,0 +1,54 @@
struct Num { rdigits: Vec<u8> }
impl Num {
pub fn from(s: &String) -> Num {
let rd: Vec<u8> = s.chars().rev()
.map(|c| String::from(c).parse::<u8>().unwrap())
.collect();
Num { rdigits: rd }
}
pub fn add(&self, n: &Num) -> Num {
let mut xs = self.rdigits.clone();
let mut ys = n.rdigits.clone();
let mut rs: Vec<u8> = Vec::new();
while xs.len() < ys.len() { xs.push(0); }
while ys.len() < xs.len() { ys.push(0); }
let mut rm = 0u8;
for (a, b) in xs.iter().zip(ys.iter()) {
if a + b + rm > 9 {
rs.push((a + b + rm) - 10);
rm = 1u8;
} else {
rs.push(a + b + rm);
rm = 0u8;
}
}
if rm > 0 { rs.push(1u8); }
Num { rdigits: rs }
}
pub fn print(&self) {
for c in self.rdigits.iter().rev() { print!("{}", c); };
println!("");
}
pub fn sum(&self) -> u32 {
let mut res = 0u32;
for c in self.rdigits.iter() { res += *c as u32; }
res
}
}
fn main() {
let mut n = Num::from(&String::from("1"));
for _i in 0..1000 {
n = n.add(&n);
}
n.print();
//println!("-----------");
println!("[{}]", n.sum());
}
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