回答編集履歴
2
コード追記
test
CHANGED
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@@ -21,3 +21,9 @@
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21
21
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a[1].resize(5);
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22
22
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23
23
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```
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24
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+
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25
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+
```C++
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26
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+
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27
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+
std::vector<std::vector<int>> a = {std::vector<int>(3), std::vector<int>(5)};
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28
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+
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29
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+
```
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1
コード追記
test
CHANGED
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@@ -9,3 +9,15 @@
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9
9
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a.push_back(std::vector<int>(5));
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10
10
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11
11
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```
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12
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+
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13
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+
もしくは
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14
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+
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15
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+
```C++
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16
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+
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17
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std::vector<std::vector<int>> a(2);
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18
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+
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19
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a[0].resize(3);
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20
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+
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21
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+
a[1].resize(5);
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22
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+
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23
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+
```
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