Created
September 6, 2015 06:57
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| template<typename T> | |
| bool is_even_0(T v) { | |
| // v is odd iff it has an multiplicative inverse modulo 2^bitwidth(T) | |
| for (T i = 1; i != 0; i++) | |
| if (T(v * i) == T(1)) | |
| return false; // odd | |
| return true; | |
| } |
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