Commit c288887

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Update and rename fill.cpp to fill_memset.cpp

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Original file line number	Diff line number	Diff line change
`@@ -11,3 +11,5 @@ main() {`
`11`	`11`	`int low[n+10][K+10]; memset(low, 0x3f, sizeof(low)); // set 0x3f3f3f3f for all. This is a big positive number`
`12`	`12`	`int upp[n+10][K+10]; memset(upp, 0xcf, sizeof(upp)); // set 0xcfcfcfcf for all. This is a big negative number.`
`13`	`13`	`}`
	`14`	`+`
	`15`	`+// 如果 low 不是真正的二维数组(例如你用了 int** low 或 vector<vector<int>> low),那么 sizeof(low) 不会返回元素占用的总字节数(对于指针 it'll be pointer size),memset 的长度参数会不正确导致越界或只初始化了指针。如果使用动态分配/vector,请用 std::fill 或 fill_n`

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