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@ -1,5 +1,4 @@
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#include <iostream>
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#include <stdexcept>
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using ll = long long;
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@ -41,7 +40,7 @@ void dfs(const ll x)noexcept{
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return;
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}
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int main()noexcept{
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int main(){
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is>>n;
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dfs(1);
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os<<sum<<'\n';
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