QOJ.ac
QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #455564 | #7276. A Light Inconvenience | yoy68 | Compile Error | / | / | C++14 | 948b | 2024-06-26 16:24:32 | 2024-06-26 16:24:33 |
Due to the privacy settings of the submitter, you are not allowed to view this code.
详细
implementer.cpp:17:22: error: ‘optional’ does not name a type
17 | template<typename T> optional<T> read() {
| ^~~~~~~~
implementer.cpp: In function ‘int main()’:
implementer.cpp:36:17: error: ‘optional’ was not declared in this scope
36 | optional<long long> d = read<long long>();
| ^~~~~~~~
implementer.cpp:36:17: note: ‘std::optional’ is only available from C++17 onwards
implementer.cpp:36:26: error: expected primary-expression before ‘long’
36 | optional<long long> d = read<long long>();
| ^~~~
implementer.cpp:37:24: error: ‘d’ was not declared in this scope
37 | if(not d or *d == 0)
| ^