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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int r = 5;
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const double PI = 3.141593;
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cout << 2 * PI * r << endl;
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cout << PI * r * r << endl;
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cout << 4.0 / 3 * PI * r * r * r << endl;
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return 0;
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} |
