Submission #7209763

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Source Code Expand

#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
template<class S, class T> inline S max_L(S a,T b){
  return a>=b?a:b;
}
inline void rd(double &x){
  scanf("%lf",&x);
}
inline void wt_L(char a){
  putchar_unlocked(a);
}
inline void wt_L(double x){
  printf("%.15f",x);
}
int main(){
  double P, res, x;
  rd(P);
  x =max_L(0.0, 1.5 * log(P / 1.5 * log(2.0)) / log(2.0));
  res = x + pow(2, -x/1.5) * P;
  wt_L(res);
  wt_L('\n');
  return 0;
}
// cLay varsion 20190830-1

// --- original code ---
// {
//   double P, x, res;
//   rd(P);
//   x = max(0.0, 1.5 * log(P / 1.5 * log(2.0)) / log(2.0));
//   res = x + pow(2, -x/1.5) * P;
//   wt(res);
// }

Submission Info

Compile Error

./Main.cpp: In function ‘void rd(double&)’:
./Main.cpp:8:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf",&x);
                  ^

Judge Result