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31 lines
548 B
31 lines
548 B
#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<<"ÎÞ·¨ÓʼÄ"<<endl;
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}
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return 0;
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}
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