Submission #8239260

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Source Code Expand

#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
#define PI 3.14159265358979323846
inline void rd(double &x){
  scanf("%lf",&x);
}
inline void wt_L(char a){
  putchar_unlocked(a);
}
inline void wt_L(int x){
  int s=0;
  int m=0;
  char f[10];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    putchar_unlocked('-');
  }
  while(s--){
    putchar_unlocked(f[s]+'0');
  }
}
inline void wt_L(unsigned x){
  int s=0;
  char f[10];
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  while(s--){
    putchar_unlocked(f[s]+'0');
  }
}
inline void wt_L(long long x){
  int s=0;
  int m=0;
  char f[20];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    putchar_unlocked('-');
  }
  while(s--){
    putchar_unlocked(f[s]+'0');
  }
}
inline void wt_L(unsigned long long x){
  int s=0;
  char f[21];
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  while(s--){
    putchar_unlocked(f[s]+'0');
  }
}
inline void wt_L(double x){
  printf("%.15f",x);
}
inline void wt_L(const char c[]){
  int i=0;
  for(i=0;c[i]!='\0';i++){
    putchar_unlocked(c[i]);
  }
}
inline void wt_L(string &x){
  int i=0;
  for(i=0;x[i]!='\0';i++){
    putchar_unlocked(x[i]);
  }
}
double A;
double B;
double X;
int main(){
  rd(A);
  rd(B);
  rd(X);
  X /= A;
  if(X >= A*B/2){
    wt_L((atan2(A*B-X,A*A/2)) * 180 / PI);
    wt_L('\n');
  }
  else{
    wt_L((PI/2-atan2(X,B*B/2)) * 180 / PI);
    wt_L('\n');
  }
  return 0;
}
// cLay varsion 20191027-1

// --- original code ---
// double A, B, X;
// {
//   rd(A,B,X);
//   X /= A;
//   wt( (if[X >= A*B/2, atan2(A*B-X,A*A/2), PI/2-atan2(X,B*B/2)]) * 180 / PI );
// }

Submission Info

Compile Error

./Main.cpp: In function ‘void rd(double&)’:
./Main.cpp:6:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf",&x);
                  ^

Judge Result