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#include<iostream>
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using namespace std;
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int main() {
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int n;
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cout<<"n=";
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cin>>n;
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switch(n) {
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case 1:
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cout<<"f=n"<<endl;
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break;
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case 2:
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cout<<"f=n*n"<<endl;
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break;
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case 3:
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cout<<"f=n*n*n"<<endl;
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break;
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default:
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cout<<"f=0";
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break;
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}
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return 0;
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}
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