52 lines
1.2 KiB
Rust
52 lines
1.2 KiB
Rust
use std::io::stdin;
|
|
|
|
fn minimum_milking_time(mut cows: Vec<(i64, i64)>) -> i64 {
|
|
cows.sort_by_key(|x| x.1 );
|
|
|
|
let mut left = 0;
|
|
let mut right = cows.len() - 1;
|
|
|
|
let mut time_maxima = 0;
|
|
|
|
while left <= right {
|
|
let (left_count, left_milk) = cows[left];
|
|
let (right_count, right_milk) = cows[right];
|
|
|
|
if (left_count <= 0) {
|
|
left += 1;
|
|
continue;
|
|
}
|
|
if (right_count <= 0) {
|
|
right -= 1;
|
|
continue;
|
|
}
|
|
|
|
time_maxima = time_maxima.max(left_milk + right_milk);
|
|
|
|
cows[left].0 -= 1;
|
|
cows[right].0 -= 1;
|
|
}
|
|
|
|
time_maxima
|
|
}
|
|
|
|
fn main() {
|
|
let mut line = String::new();
|
|
stdin().read_line(&mut line).unwrap();
|
|
|
|
let n: usize = line.trim().parse().unwrap();
|
|
let cows = (0..n).map(
|
|
|_| {
|
|
line.clear();
|
|
stdin().read_line(&mut line).unwrap();
|
|
let mut iter = line
|
|
.trim()
|
|
.split(' ')
|
|
.map(|x| x.parse::<i64>().unwrap());
|
|
|
|
(iter.next().unwrap(), iter.next().unwrap())
|
|
}
|
|
).collect::<Vec<(i64, i64)>>();
|
|
|
|
println!("{}", minimum_milking_time(cows));
|
|
} |