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B2027 计算球的体积
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Luogu/B2027/B2027.cpp
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Luogu/B2027/B2027.cpp
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#include <iomanip>
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#include <iostream>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const double pi = 3.14;
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double r;
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int main() {
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std::ios::sync_with_stdio(false);
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cin >> r;
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cout << std::fixed << std::setprecision(5) << 4.0 / 3.0 * pi * r * r * r << endl;
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return 0;
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}
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