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Commit efda7a6

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author
openset
committed
Add: Binary Prefix Divisible By 5
1 parent 947b9ca commit efda7a6

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2 files changed

+52
-0
lines changed

2 files changed

+52
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lines changed
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package binary_prefix_divisible_by_5
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func prefixesDivBy5(A []int) []bool {
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ans, v := make([]bool, len(A)), 0
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for i, b := range A {
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v = (v<<1 + b) % 5
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ans[i] = v == 0
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}
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return ans
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}
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package binary_prefix_divisible_by_5
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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 []bool
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}
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func TestPrefixesDivBy5(t *testing.T) {
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tests := [...]caseType{
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{
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input: []int{0, 1, 1},
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expected: []bool{true, false, false},
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},
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{
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input: []int{1, 1, 1},
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expected: []bool{false, false, false},
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},
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{
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input: []int{0, 1, 1, 1, 1, 1},
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expected: []bool{true, false, false, false, true, false},
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},
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{
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input: []int{1, 1, 1, 0, 1},
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expected: []bool{false, false, false, false, false},
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},
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{
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input: []int{1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0},
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expected: []bool{false, false, true, false, false, false, false, false, false, false, true, true, true, true, true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, true, false, false, true, false, false, true, true, true, true, true, true, true, false, false, true, false, false, false, false, true, true},
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},
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}
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for _, tc := range tests {
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output := prefixesDivBy5(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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