33 lines
959 B
Rust
33 lines
959 B
Rust
fn knapsack(items: Vec<(i32, i32)>, capacity: i32) -> i32 {
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let mut states = vec![-1; (capacity + 1) as usize];
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let mut result = vec![];
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states[0] = 0;
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if items[0].0 <= capacity { states[items[0].0 as usize] = items[0].1; }
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for i in 1..items.len() {
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for j in 0..=(capacity - items[i].0) as usize {
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if states[j] >= 0 {
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let value = states[j] + items[i].1;
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if value > states[j+items[i].0 as usize] {
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states[j+items[i].0 as usize] = value;
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result.push(items[i].0);
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}
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}
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}
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}
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let mut max_value = -1;
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for i in (0..=capacity as usize).rev() {
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if states[i] >= max_value {
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max_value = states[i];
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}
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}
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max_value
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}
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fn main() {
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let items = vec![(2, 3), (2, 4), (4, 8), (6, 9), (3, 6)];
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let capacity = 9;
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let m = knapsack(items, capacity);
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println!("{}", m);
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}
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