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Commit 5e65ccc

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author
openset
committed
Add: Generate Parentheses
1 parent de67f03 commit 5e65ccc

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2 files changed

+113
-2
lines changed

2 files changed

+113
-2
lines changed
Lines changed: 19 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1 +1,19 @@
1-
package generate_parentheses
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package problem_22
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func generateParenthesis(n int) []string {
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ans := make([]string, 0)
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next("(", 1, 0, n, &ans)
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return ans
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}
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func next(s string, l, r, n int, ans *[]string) {
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if l == n && r == n {
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*ans = append(*ans, s)
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}
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if l < n {
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next(s+"(", l+1, r, n, ans)
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}
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if r < n && r < l {
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next(s+")", l, r+1, n, ans)
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}
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}
Lines changed: 94 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1 +1,94 @@
1-
package generate_parentheses
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package problem_22
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import (
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"reflect"
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"testing"
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)
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type caseType struct {
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input int
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expected []string
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}
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func TestGenerateParenthesis(t *testing.T) {
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tests := [...]caseType{
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{
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input: 3,
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expected: []string{
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"((()))",
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"(()())",
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"(())()",
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"()(())",
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"()()()",
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},
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},
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{
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input: 2,
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expected: []string{
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"(())",
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"()()",
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},
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},
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{
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input: 1,
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expected: []string{"()"},
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},
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{
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input: 0,
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expected: []string{},
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},
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{
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input: 5,
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expected: []string{
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"((((()))))",
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"(((()())))",
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"(((())()))",
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"(((()))())",
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"(((())))()",
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"((()(())))",
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"((()()()))",
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"((()())())",
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"((()()))()",
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"((())(()))",
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"((())()())",
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"((())())()",
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"((()))(())",
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"((()))()()",
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"(()((())))",
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"(()(()()))",
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"(()(())())",
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"(()(()))()",
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"(()()(()))",
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"(()()()())",
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"(()()())()",
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"(()())(())",
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"(()())()()",
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"(())((()))",
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"(())(()())",
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"(())(())()",
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"(())()(())",
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"(())()()()",
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"()(((())))",
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"()((()()))",
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"()((())())",
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"()((()))()",
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"()(()(()))",
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"()(()()())",
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"()(()())()",
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"()(())(())",
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"()(())()()",
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"()()((()))",
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"()()(()())",
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"()()(())()",
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"()()()(())",
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"()()()()()",
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},
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},
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}
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for _, tc := range tests {
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output := generateParenthesis(tc.input)
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if !reflect.DeepEqual(output, tc.expected) {
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t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)
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}
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}
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}

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