|
| 1 | +--- |
| 2 | +comments: true |
| 3 | +difficulty: 中等 |
| 4 | +edit_url: https://github.com/doocs/leetcode/edit/main/solution/3500-3599/3522.Calculate%20Score%20After%20Performing%20Instructions/README.md |
| 5 | +--- |
| 6 | + |
| 7 | +<!-- problem:start --> |
| 8 | + |
| 9 | +# [3522. 执行指令后的得分](https://leetcode.cn/problems/calculate-score-after-performing-instructions) |
| 10 | + |
| 11 | +[English Version](/solution/3500-3599/3522.Calculate%20Score%20After%20Performing%20Instructions/README_EN.md) |
| 12 | + |
| 13 | +## 题目描述 |
| 14 | + |
| 15 | +<!-- description:start --> |
| 16 | + |
| 17 | +<p>给你两个数组:<code>instructions</code> 和 <code>values</code>,数组的长度均为 <code>n</code>。</p> |
| 18 | + |
| 19 | +<p>你需要根据以下规则模拟一个过程:</p> |
| 20 | + |
| 21 | +<ul> |
| 22 | + <li>从下标 <code>i = 0</code> 的第一个指令开始,初始得分为 0。</li> |
| 23 | + <li>如果 <code>instructions[i]</code> 是 <code>"add"</code>: |
| 24 | + <ul> |
| 25 | + <li>将 <code>values[i]</code> 加到你的得分中。</li> |
| 26 | + <li>移动到下一个指令 <code>(i + 1)</code>。</li> |
| 27 | + </ul> |
| 28 | + </li> |
| 29 | + <li>如果 <code>instructions[i]</code> 是 <code>"jump"</code>: |
| 30 | + <ul> |
| 31 | + <li>移动到下标为 <code>(i + values[i])</code> 的指令,但不修改你的得分。</li> |
| 32 | + </ul> |
| 33 | + </li> |
| 34 | +</ul> |
| 35 | + |
| 36 | +<p>当以下任一情况发生时,过程会终止:</p> |
| 37 | + |
| 38 | +<ul> |
| 39 | + <li>越界(即 <code>i < 0</code> 或 <code>i >= n</code>),或</li> |
| 40 | + <li>尝试再次执行已经执行过的指令。被重复访问的指令不会再次执行。</li> |
| 41 | +</ul> |
| 42 | + |
| 43 | +<p>返回过程结束时的得分。</p> |
| 44 | + |
| 45 | +<p> </p> |
| 46 | + |
| 47 | +<p><strong class="example">示例 1:</strong></p> |
| 48 | + |
| 49 | +<div class="example-block"> |
| 50 | +<p><strong>输入:</strong> <span class="example-io">instructions = ["jump","add","add","jump","add","jump"], values = [2,1,3,1,-2,-3]</span></p> |
| 51 | + |
| 52 | +<p><strong>输出:</strong> <span class="example-io">1</span></p> |
| 53 | + |
| 54 | +<p><strong>解释:</strong></p> |
| 55 | + |
| 56 | +<p>从下标 0 开始模拟过程:</p> |
| 57 | + |
| 58 | +<ul> |
| 59 | + <li>下标 0:指令是 <code>"jump"</code>,移动到下标 <code>0 + 2 = 2</code>。</li> |
| 60 | + <li>下标 2:指令是 <code>"add"</code>,将 <code>values[2] = 3</code> 加到得分中,移动到下标 3。得分变为 3。</li> |
| 61 | + <li>下标 3:指令是 <code>"jump"</code>,移动到下标 <code>3 + 1 = 4</code>。</li> |
| 62 | + <li>下标 4:指令是 <code>"add"</code>,将 <code>values[4] = -2</code> 加到得分中,移动到下标 5。得分变为 1。</li> |
| 63 | + <li>下标 5:指令是 <code>"jump"</code>,移动到下标 <code>5 + (-3) = 2</code>。</li> |
| 64 | + <li>下标 2:已经访问过。过程结束。</li> |
| 65 | +</ul> |
| 66 | +</div> |
| 67 | + |
| 68 | +<p><strong class="example">示例 2:</strong></p> |
| 69 | + |
| 70 | +<div class="example-block"> |
| 71 | +<p><strong>输入:</strong> <span class="example-io">instructions = ["jump","add","add"], values = [3,1,1]</span></p> |
| 72 | + |
| 73 | +<p><strong>输出:</strong> <span class="example-io">0</span></p> |
| 74 | + |
| 75 | +<p><strong>解释:</strong></p> |
| 76 | + |
| 77 | +<p>从下标 0 开始模拟过程:</p> |
| 78 | + |
| 79 | +<ul> |
| 80 | + <li>下标 0:指令是 <code>"jump"</code>,移动到下标 <code>0 + 3 = 3</code>。</li> |
| 81 | + <li>下标 3:越界。过程结束。</li> |
| 82 | +</ul> |
| 83 | +</div> |
| 84 | + |
| 85 | +<p><strong class="example">示例 3:</strong></p> |
| 86 | + |
| 87 | +<div class="example-block"> |
| 88 | +<p><strong>输入:</strong> <span class="example-io">instructions = ["jump"], values = [0]</span></p> |
| 89 | + |
| 90 | +<p><strong>输出:</strong> <span class="example-io">0</span></p> |
| 91 | + |
| 92 | +<p><strong>解释:</strong></p> |
| 93 | + |
| 94 | +<p>从下标 0 开始模拟过程:</p> |
| 95 | + |
| 96 | +<ul> |
| 97 | + <li>下标 0:指令是 <code>"jump"</code>,移动到下标 <code>0 + 0 = 0</code>。</li> |
| 98 | + <li>下标 0:已经访问过。过程结束。</li> |
| 99 | +</ul> |
| 100 | +</div> |
| 101 | + |
| 102 | +<p> </p> |
| 103 | + |
| 104 | +<p><strong>提示:</strong></p> |
| 105 | + |
| 106 | +<ul> |
| 107 | + <li><code>n == instructions.length == values.length</code></li> |
| 108 | + <li><code>1 <= n <= 10<sup>5</sup></code></li> |
| 109 | + <li><code>instructions[i]</code> 只能是 <code>"add"</code> 或 <code>"jump"</code>。</li> |
| 110 | + <li><code>-10<sup>5</sup> <= values[i] <= 10<sup>5</sup></code></li> |
| 111 | +</ul> |
| 112 | + |
| 113 | +<!-- description:end --> |
| 114 | + |
| 115 | +## 解法 |
| 116 | + |
| 117 | +<!-- solution:start --> |
| 118 | + |
| 119 | +### 方法一:模拟 |
| 120 | + |
| 121 | +我们根据题意模拟即可。 |
| 122 | + |
| 123 | +我们定义一个长度为 $n$ 的布尔数组 $\textit{vis}$,用于记录每一条指令是否被执行过,初始时均为 $\text{false}$。 |
| 124 | + |
| 125 | +然后我们从下标 $i = 0$ 开始,循环执行以下操作: |
| 126 | + |
| 127 | +1. 将 $\textit{vis}[i]$ 置为 $\text{true}$; |
| 128 | +2. 如果 $\textit{instructions}[i]$ 的第一个字符为 'a',那么我们将答案增加 $\textit{value}[i]$,然后 $i$ 加 $1$;否则,我们将 $i$ 增加 $\textit{value}[i]$。 |
| 129 | + |
| 130 | +循环,直至 $i \lt 0$ 或者 $i \ge n$,或者 $\textit{vis}[i]$ 为 $\text{true}$。 |
| 131 | + |
| 132 | +最后返回答案即可。 |
| 133 | + |
| 134 | +时间复杂度 $O(n)$,空间复杂度 $O(n)$。其中 $n$ 是数组 $\textit{value}$ 的长度。 |
| 135 | + |
| 136 | +<!-- tabs:start --> |
| 137 | + |
| 138 | +#### Python3 |
| 139 | + |
| 140 | +```python |
| 141 | +class Solution: |
| 142 | + def calculateScore(self, instructions: List[str], values: List[int]) -> int: |
| 143 | + n = len(values) |
| 144 | + vis = [False] * n |
| 145 | + ans = i = 0 |
| 146 | + while 0 <= i < n and not vis[i]: |
| 147 | + vis[i] = True |
| 148 | + if instructions[i][0] == "a": |
| 149 | + ans += values[i] |
| 150 | + i += 1 |
| 151 | + else: |
| 152 | + i = i + values[i] |
| 153 | + return ans |
| 154 | +``` |
| 155 | + |
| 156 | +#### Java |
| 157 | + |
| 158 | +```java |
| 159 | +class Solution { |
| 160 | + public long calculateScore(String[] instructions, int[] values) { |
| 161 | + int n = values.length; |
| 162 | + boolean[] vis = new boolean[n]; |
| 163 | + long ans = 0; |
| 164 | + int i = 0; |
| 165 | + |
| 166 | + while (i >= 0 && i < n && !vis[i]) { |
| 167 | + vis[i] = true; |
| 168 | + if (instructions[i].charAt(0) == 'a') { |
| 169 | + ans += values[i]; |
| 170 | + i += 1; |
| 171 | + } else { |
| 172 | + i = i + values[i]; |
| 173 | + } |
| 174 | + } |
| 175 | + |
| 176 | + return ans; |
| 177 | + } |
| 178 | +} |
| 179 | +``` |
| 180 | + |
| 181 | +#### C++ |
| 182 | + |
| 183 | +```cpp |
| 184 | +class Solution { |
| 185 | +public: |
| 186 | + long long calculateScore(vector<string>& instructions, vector<int>& values) { |
| 187 | + int n = values.size(); |
| 188 | + vector<bool> vis(n, false); |
| 189 | + long long ans = 0; |
| 190 | + int i = 0; |
| 191 | + |
| 192 | + while (i >= 0 && i < n && !vis[i]) { |
| 193 | + vis[i] = true; |
| 194 | + if (instructions[i][0] == 'a') { |
| 195 | + ans += values[i]; |
| 196 | + i += 1; |
| 197 | + } else { |
| 198 | + i += values[i]; |
| 199 | + } |
| 200 | + } |
| 201 | + |
| 202 | + return ans; |
| 203 | + } |
| 204 | +}; |
| 205 | +``` |
| 206 | + |
| 207 | +#### Go |
| 208 | + |
| 209 | +```go |
| 210 | +func calculateScore(instructions []string, values []int) (ans int64) { |
| 211 | + n := len(values) |
| 212 | + vis := make([]bool, n) |
| 213 | + i := 0 |
| 214 | + for i >= 0 && i < n && !vis[i] { |
| 215 | + vis[i] = true |
| 216 | + if instructions[i][0] == 'a' { |
| 217 | + ans += int64(values[i]) |
| 218 | + i += 1 |
| 219 | + } else { |
| 220 | + i += values[i] |
| 221 | + } |
| 222 | + } |
| 223 | + return |
| 224 | +} |
| 225 | +``` |
| 226 | + |
| 227 | +#### TypeScript |
| 228 | + |
| 229 | +```ts |
| 230 | +function calculateScore(instructions: string[], values: number[]): number { |
| 231 | + const n = values.length; |
| 232 | + const vis: boolean[] = Array(n).fill(false); |
| 233 | + let ans = 0; |
| 234 | + let i = 0; |
| 235 | + |
| 236 | + while (i >= 0 && i < n && !vis[i]) { |
| 237 | + vis[i] = true; |
| 238 | + if (instructions[i][0] === 'a') { |
| 239 | + ans += values[i]; |
| 240 | + i += 1; |
| 241 | + } else { |
| 242 | + i += values[i]; |
| 243 | + } |
| 244 | + } |
| 245 | + |
| 246 | + return ans; |
| 247 | +} |
| 248 | +``` |
| 249 | + |
| 250 | +<!-- tabs:end --> |
| 251 | + |
| 252 | +<!-- solution:end --> |
| 253 | + |
| 254 | +<!-- problem:end --> |
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