17 lines
409 B
C++
17 lines
409 B
C++
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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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//cin读入优化
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std::ios::sync_with_stdio(false);
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int h, r;
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cin >> h >> r;
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double v = (3.14 * r * r * h) / 1000; //一桶水的体积
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cout << ceil(20 / v) << endl; //向上取整
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//cout << floor(20 / v) << endl; //向下取整
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//cout << round(20 / v) << endl; //四舍五入取整
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return 0;
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}
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