15 lines
214 B
C++
15 lines
214 B
C++
#include<cstdio>
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using namespace std;
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#define pi 3.1415926535897
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int main()
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{
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double v,r,h;
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scanf("%lf%lf",&h,&r);
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v=h*pi*r*r;
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int ans=0;
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double k=20;
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while(k>0) k-=v,ans++;
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printf("%d\n",ans);
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return 0;
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}
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