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CyC2018 2019-10-17 01:34:50 +08:00
parent cead11206b
commit 092fef5d60
2 changed files with 20 additions and 16 deletions
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18
docs/notes/Leetcode 题解 - 动态规划.md
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@ -869,18 +869,20 @@ return -1.
```java
public int coinChange(int[] coins, int amount) {
public int change(int amount, int[] coins) {
if (coins == null) {
return 0;
}
int[] dp = new int[amount + 1];
dp[0] = 1;
for (int coin : coins) {
for (int i = coin; i <= amount; i++) {
dp[i] += dp[i - coin];
for (int i = coin; i <= amount; i++) { //将逆序遍历改为正序遍历
if (i == coin) {
dp[i] = 1;
} else if (dp[i] == 0 && dp[i - coin] != 0) {
dp[i] = dp[i - coin] + 1;
} else if (dp[i - coin] != 0) {
dp[i] = Math.min(dp[i], dp[i - coin] + 1);
}
}
}
return dp[amount];
return dp[amount] == 0 ? -1 : dp[amount];
}
```

18
notes/Leetcode 题解 - 动态规划.md
View File

@ -869,18 +869,20 @@ return -1.
```java
public int coinChange(int[] coins, int amount) {
public int change(int amount, int[] coins) {
if (coins == null) {
return 0;
}
int[] dp = new int[amount + 1];
dp[0] = 1;
for (int coin : coins) {
for (int i = coin; i <= amount; i++) {
dp[i] += dp[i - coin];
for (int i = coin; i <= amount; i++) { //将逆序遍历改为正序遍历
if (i == coin) {
dp[i] = 1;
} else if (dp[i] == 0 && dp[i - coin] != 0) {
dp[i] = dp[i - coin] + 1;
} else if (dp[i - coin] != 0) {
dp[i] = Math.min(dp[i], dp[i - coin] + 1);
}
}
}
return dp[amount];
return dp[amount] == 0 ? -1 : dp[amount];
}
```