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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 |
---|---|---|---|---|---|---|---|---|---|
#455544 | #7276. A Light Inconvenience | yoy68 | Compile Error | / | / | C++14 | 944b | 2024-06-26 16:12:52 | 2024-06-26 16:12:53 |
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詳細信息
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) | ^