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arrow_back常数优化共2篇文章
RocksonLee
2021-09-27 21:37:57
快速幂
```cpp long long pow_quick(long long a, long long n){ long long res = 1; while(n){ if(n & 1){ res *= a; //判断最后一
RocksonLee
2021-09-27 21:30:47
代码
```cpp int read() { int x = 0, w = 1; char ch = 0; while (ch < '0' || ch > '9') { // ch 不是数字时 if (ch == '-')
