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|
use std::io;
fn rotate(dial: i32, change: i32, all_zeros: &mut i32) -> i32 {
/*
let mut ret = dial + change;
if ret == 0 {
*all_zeros += 1;
}
while ret < 0 {
ret += 100;
if dial > 0 {
*all_zeros += 1;
}
}
while ret > 99 {
ret -= 100;
if dial > 0 {
*all_zeros += 1;
}
}
return ret;
*/
let mut ret = dial;
let mut change = change;
loop {
if change < 0 {
ret -= 1;
change += 1;
if ret == -1 {
ret = 99;
}
} else {
ret += 1;
change -= 1;
if ret == 100 {
ret = 0;
}
}
if ret == 0 {
*all_zeros += 1;
}
if change == 0 {
break;
}
}
ret
}
fn main() {
let mut dial = 50;
let mut zeros = 0;
let mut all_zeros = 0;
loop {
let mut buffer = String::new();
let bytes = io::stdin().read_line(&mut buffer).unwrap();
if bytes == 0 {
break;
}
let (dir, value_str) = buffer.trim_end().split_at(1);
let left = match dir {
"L" => true,
"R" => false,
_ => panic!(),
};
let mut value = value_str.parse::<i32>().unwrap();
if left {
value = -value;
}
if value != 0 {
dial = rotate(dial, value, &mut all_zeros);
}
if dial == 0 {
zeros += 1;
}
}
println!("Zeros {}", zeros);
println!("All zeros {}", all_zeros);
}
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