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44 lines
837 B
44 lines
837 B
package main
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import (
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"fmt"
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"strconv"
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)
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func main() {
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// 时间复杂度=o(1)
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fmt.Println("1 Hello World!")
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// 时间复杂度=o(n)
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for i, n := 0, 100; i < n; i++ {
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fmt.Println(strconv.Itoa(i), " Hello World!")
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}
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// 时间复杂度=o(n)
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for i, n, m := 0, 100, 10; i < n; i++ {
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for j := 0; j < m; j++ {
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fmt.Println(strconv.Itoa(i), strconv.Itoa(j), " Hello World!")
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}
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}
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// 时间复杂度=o(1)
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fmt.Println("1 Hello World!")
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fmt.Println("2 Hello World!")
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fmt.Println("3 Hello World!")
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// 时间复杂度=o(n<sup>2</sup>)
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for i, n, m := 0, 100, 10; i < n; i++ {
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fmt.Println(strconv.Itoa(i), " Hello World!")
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for j := 0; j < m; j++ {
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fmt.Println(strconv.Itoa(j), " Hello World!")
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}
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}
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// 时间复杂度=o(log n)
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n := 100
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for n > 1 {
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fmt.Println(strconv.Itoa(n), " Hello World!")
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n /= 2
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}
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}
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