45 lines
943 B
Rust
45 lines
943 B
Rust
/**
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* [322] Coin Change
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*/
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pub struct Solution {}
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// submission codes start here
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impl Solution {
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pub fn coin_change(coins: Vec<i32>, amount: i32) -> i32 {
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let amount = amount as usize;
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let mut dp = vec![i32::MAX; amount + 1];
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dp[0] = 0;
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for i in 1..=amount {
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for coin in &coins {
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let coin = *coin as usize;
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if coin <= i && dp[i - coin] != i32::MAX {
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dp[i] = dp[i].min(dp[i - coin] + 1);
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}
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}
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}
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return if dp[amount] == i32::MAX {
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-1
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} else {
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dp[amount]
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};
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}
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}
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_322() {
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assert_eq!(3, Solution::coin_change(vec![1,2,5], 11));
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assert_eq!(-1, Solution::coin_change(vec![2], 3));
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assert_eq!(0, Solution::coin_change(vec![1], 0));
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}
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}
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