68 lines
1.1 KiB
Text
68 lines
1.1 KiB
Text
import extensions;
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import system'routines;
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import system'collections;
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import extensions'routines;
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class EquilibriumEnumerator : Enumerator
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{
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int left;
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int right;
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int index;
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Enumerator en;
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constructor new(Enumerator en)
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{
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this en := en;
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self.reset()
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}
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constructor new(Enumerable list)
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<= new(list.enumerator());
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constructor new(o)
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<= new(cast Enumerable(o));
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bool next()
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{
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index += 1;
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while(en.next())
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{
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var element := *en;
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right -= element;
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bool found := (left == right);
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left += element;
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if (found)
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{
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^ true
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};
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index += 1
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};
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^ false
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}
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reset()
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{
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en.reset();
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left := 0;
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right := en.summarize();
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index := -1;
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en.reset();
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}
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get Value() = index;
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enumerable() => en;
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}
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public program()
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{
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EquilibriumEnumerator.new(new int[]{ -7, 1, 5, 2, -4, 3, 0 })
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.forEach(printingLn)
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}
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