pOw
2023-08-16 14:56:10
发布于：广东
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#include<bits/stdc++.h>
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using namespace std;
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int main(){
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long long n,k;
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cin>>k;
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for(int i=0;i<k;i++){
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if(pow(2,i)<=k)n+=pow(2,i);
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else break;
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}cout<<n;
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}
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2025-10-07 来自 广东
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