Commit 294aef3

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openset

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Add: Perfect Number

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Lines changed: 30 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,31 @@`
`1`	`1`	`package problem507`
	`2`	`+`
	`3`	`+// Solution 1`
	`4`	`+func checkPerfectNumber(num int) bool {`
	`5`	`+ if num < 6 {`
	`6`	`+ return false`
	`7`	`+ }`
	`8`	`+ sum, mid := 1, num`
	`9`	`+ for i := 2; i < mid; i++ {`
	`10`	`+ if num%i == 0 {`
	`11`	`+ n := num / i`
	`12`	`+ sum += i + n`
	`13`	`+ if mid > n {`
	`14`	`+ mid = n`
	`15`	`+ }`
	`16`	`+ }`
	`17`	`+ }`
	`18`	`+ return sum == num`
	`19`	`+}`
	`20`	`+`
	`21`	`+// Solution 2`
	`22`	`+func checkPerfectNumber2(num int) bool {`
	`23`	`+ m := map[int]bool{`
	`24`	`+ 6: true,`
	`25`	`+ 28: true,`
	`26`	`+ 496: true,`
	`27`	`+ 8128: true,`
	`28`	`+ 33550336: true,`
	`29`	`+ }`
	`30`	`+ return m[num]`
	`31`	`+}`

Lines changed: 46 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,47 @@`
`1`	`1`	`package problem507`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type testType struct {`
	`6`	`+ in int`
	`7`	`+ want bool`
	`8`	`+}`
	`9`	`+`
	`10`	`+func TestCheckPerfectNumber(t *testing.T) {`
	`11`	`+ tests := [...]testType{`
	`12`	`+ {`
	`13`	`+ in: 28,`
	`14`	`+ want: true,`
	`15`	`+ },`
	`16`	`+ {`
	`17`	`+ in: 6,`
	`18`	`+ want: true,`
	`19`	`+ },`
	`20`	`+ {`
	`21`	`+ in: 24,`
	`22`	`+ want: false,`
	`23`	`+ },`
	`24`	`+ {`
	`25`	`+ in: 1,`
	`26`	`+ want: false,`
	`27`	`+ },`
	`28`	`+ {`
	`29`	`+ in: 33550336,`
	`30`	`+ want: true,`
	`31`	`+ },`
	`32`	`+ }`
	`33`	`+ // Solution 1`
	`34`	`+ for _, tt := range tests {`
	`35`	`+ got := checkPerfectNumber(tt.in)`
	`36`	`+ if got != tt.want {`
	`37`	`+ t.Fatalf("in: %v, got: %v, want: %v", tt.in, got, tt.want)`
	`38`	`+ }`
	`39`	`+ }`
	`40`	`+ // Solution 2`
	`41`	`+ for _, tt := range tests {`
	`42`	`+ got := checkPerfectNumber2(tt.in)`
	`43`	`+ if got != tt.want {`
	`44`	`+ t.Fatalf("in: %v, got: %v, want: %v", tt.in, got, tt.want)`
	`45`	`+ }`
	`46`	`+ }`
	`47`	`+}`

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