31 lines
578 B
C++
31 lines
578 B
C++
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#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 wei;
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cin>>wei;
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if(wei<=10){
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cout<<setiosflags(ios::fixed)
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<<setprecision(2)
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<<0.8*wei+0.2
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<<endl;
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}
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else if(wei>10 && wei<=20){
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cout<<setiosflags(ios::fixed)
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<<setprecision(2)
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<<8+0.75*(wei-10)+0.2
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<<endl;
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}
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else if(wei>20 && wei<=30){
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cout<<setiosflags(ios::fixed)
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<<setprecision(2)
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<<8+7.5+0.7*(wei-20)+0.2
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<<endl;
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}
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else{
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cout<<"<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>"<<endl;
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}
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return 0;
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}
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