21 lines
506 B
Rust
21 lines
506 B
Rust
fn coin_change(coins: Vec<i32>, amount: i32) -> i32 {
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let mut dp = vec![amount+1; (amount+1) as usize];
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dp[0] = 0;
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for i in 1..=amount as usize {
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for &coin in coins.iter() {
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if i as i32 >= coin {
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dp[i] = dp[i].min(dp[i-coin as usize] + 1);
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}
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}
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}
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let last = *dp.last().unwrap();
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if last > amount { -1 } else { last }
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}
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fn main() {
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let coins = vec![1, 3, 5];
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let m = coin_change(coins, 9);
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println!("{}", m); // 3
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}
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