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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
41 lines
1020 B
C++
41 lines
1020 B
C++
#include<iostream>
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#include<cmath>
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#include<cstdio>
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using namespace std;
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const double ee=2.718281828459;
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const double eps=1e-7;
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int main()
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{
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double x,y;
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while(scanf("%lf",&y)!=EOF)
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{
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double tmp=(1+log(y))/(y*ee);
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double low=1+eps,hei=ee-eps,mid;
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if(tmp*ee-1>eps){puts("Happy to Womens day!");continue;}
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while(hei-low>eps)
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{
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mid=(hei+low)/2;
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if(log(mid)*(y*ee)>(1+log(y))*mid)
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hei=mid;
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else
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low=mid;
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}
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if(y==1)printf("%.5lf\n",(hei+low)/2);
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else if(y>1)
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{
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double ans=(hei+low)/2;
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low=ee+eps,hei=2000000000+eps;
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while(hei-low>eps)
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{
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mid=(hei+low)/2;
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if(log(mid)*(y*ee)<(1+log(y))*mid)
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hei=mid;
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else
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low=mid;
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}
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printf("%.5lf %.5lf\n",ans,(hei+low)/2);
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}
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}
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return 0;
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}
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