21 lines
254 B
C++
21 lines
254 B
C++
#include<iostream>
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#include<iomanip>
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using namespace std;
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int main(){
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int n;
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cin >> n;
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double sum = 0.0;
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for (int i = 1; i <= n; ++i)
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{
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sum += 1.0 / i;
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}
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cout <<fixed<<setprecision(3)<<sum<<endl;
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return 0;
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} |