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@@ -134,8 +134,9 @@ func calculate(board [][]byte) int {
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break
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}
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- current := frontier[0]
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- frontier = frontier[1:]
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+ last := len(frontier) - 1
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+ current := frontier[last]
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+ frontier = frontier[:last]
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if current.x == goal.x && current.y == goal.y {
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if max < current.steps {
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