20 lines
430 B
C++
20 lines
430 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,m;
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double t;
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cin >> n;
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for(int i=0;i<n;i++){
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t = 0;
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cin >> m;
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if(m==1){
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cout << "1.00" << endl;
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continue;
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}
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for(int j =m/2+1;j<=m-m%2;j++)
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t += 1.0/j;
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t += m%2==0?0:1.0/m;
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cout << setiosflags(ios::fixed) << setprecision(2) << t << endl;
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}
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} |