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18
Task/Stack/PARI-GP/stack.parigp
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18
Task/Stack/PARI-GP/stack.parigp
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@ -0,0 +1,18 @@
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push(x)=v=concat(v,[x]);;
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pop()={
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if(#v,
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my(x=v[#v]);
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v=vecextract(v,1<<(#v-1)-1);
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x
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,
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error("Stack underflow")
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)
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};
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empty()=v==[];
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peek()={
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if(#v,
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v[#v]
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,
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error("Stack underflow")
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)
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};
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