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main.go
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main.go
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package main
import (
"math"
)
func main() {
}
func divide(dividend int, divisor int) int {
if dividend == math.MinInt32 && divisor == -1 {
return math.MaxInt32
}
positive := true
if (dividend < 0 && divisor > 0) || (dividend > 0 && divisor < 0) {
positive = false
}
res := divideUnsigned(abs(dividend), abs(divisor))
if positive {
return res
}
return -res
}
func divideUnsigned(dividend int, divisor int) int {
if dividend < divisor {
return 0
} else if dividend == divisor {
return 1
}
var e uint
n := divisor
for n < dividend {
n <<= 1
e++
}
diff := dividend - (n >> 1)
if diff >= divisor {
return 1<<(e-1) + divideUnsigned(diff, divisor)
}
return 1 << (e - 1)
}
func abs(num int) int {
if num > 0 {
return num
}
return -num
}