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15 lines
290 B
C++
15 lines
290 B
C++
#include <iostream>
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#include <cstdio>
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#include <cmath>
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#define IP 3.1415926
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using namespace std;
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int main()
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{
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double r, h;
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while( scanf("%lf %lf", &h, &r) != EOF)
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{
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double ans = asin(0.01 * r / (4 * h));
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printf("%0.2lf\n", 180 * ans / IP);
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}
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}
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