17. What is a commission rate? Commission rates are typically based on a percentage of the total sale and in some cases can also be a flat fee for each transaction. The rates are set by the merchant.
buffer[i] = (uint8_t)[arr getIndex:i];
，详情可参考搜狗输入法2026
1. 建堆：将数组构建成大顶堆（父节点 = 子节点）
Mitchell Hashimoto Co-founder, HashiCorp