Created
August 10, 2020 10:56
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| func fibExp(t fibNum, n int) fibNum { | |
| r := t | |
| // 1 | |
| a := fibNum{num: big.NewRat(1, 1), numMultipliedBySR: big.NewRat(0, 999)} | |
| for n > 1 { | |
| if n%2 == 1 { | |
| a = fibMul(a, r) | |
| } | |
| r = fibMul(r, r) | |
| n = n / 2 | |
| } | |
| return fibMul(r, a) | |
| } |
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