xD
uses crt;
var
dt,t1,t2:LongInt;
function GetTime:LongInt;
var
substr,str:string;
ERR,step,spacepos,code,num:Integer;
t:longint;
begin
ERR:=0;
repeat
t:=0;
step:=1;
if ERR<>0 then writeln('Nepravilnie dannie, povtorite vvod:');
ERR:=0;
readln(str);
str:=str+' ';
repeat
spacepos:=pos(' ',str);
if (spacepos<>0) then
begin
substr:=copy(str,1,spacepos-1);
delete(str,1,spacepos);
val(substr,num,code);
if code=0 then
begin
if (step=1) then begin if (num>=0) and (num<=23) then t:=t+num*60*60 else ERR:=3; end;
if (step=2) then begin if (num>=0) and (num<=59) then t:=t+num*60 else ERR:=3;end;
if (step=3) then begin if (num>=0) and (num<=59) then t:=t+num else ERR:=3;end;
inc(step);
end
else ERR:=2;
end else ERR:=1;
until ((step=4) or (err<>0));
until err=0;
GetTime:=t;
end;
begin
writeln('pervoe vremy:');
t1:=GetTime;
writeln('vtoroe vremy:');
t2:=GetTime;
if t2>=t1 then dt:=t2-t1 else dt:=t2-t1+24*60*60;
writeln('raznica v sekundah: ');
writeln(dt);
end.
#include <iostream>
using namespace std;
double y(double a, double b, double c, double x) {
if (c == x && b + c + x != 0)
return ((a + b) * (a + c) * (a + x)) / (b + c + x);
if (c != x && 1 + b != 0 && 1 + a != 0 && a / (1 + b) + b / (1 + a) >= 0)
return sqrt(a / (1 + b) + b / (1 + a));
return -1e9 - 7;
}
signed main() {
double a, b, c, x, ans;
cin >> a >> b >> c >> x;
ans = y(a, b, c, x);
ans == -1e9 - 7 ? cout << "No solution" : cout << ans;
}
