var a,b,c: longint; p,d,x1,x2: real; begin readln(a,b,c); p := sqr(b)-(4*a*c); if p>=0 then begin d := sqrt(p); x1 := (-b+d)/(2*a); x2 := (-b-d)/(2*a); write(d:0:1,#32,x1:0:1,#32,x2:0:1); end else write('-1'); end.
var n,i: longint; s: real; begin assign(input,'b4dttn1.inp'); assign(output,'b4dttn1.out'); reset(input); rewrite(output); readln(n); s := 0; for i := 1 to n do s := s+(2*i+1)/sqr(i*(i+1)); write(s:0:3); close(input); close(output); end.
var n,a,b,c,res: longint; begin readln(n); a := n mod 10; b := (n div 10) mod 10; c := n div 100; res := high(longint); if (a mod 2 = 0) and (res>a) then res := a; if (b mod 2 = 0) and (res>b) then res := b; if (c mod 2 = 0) and (res>c) then res := c; if res=0 then write('none'); write(res); end.
var x1,y1,x0,y0,r: longint; d: real; begin assign(input,'b8n7t11.inp'); assign(output,'b8n7t11.out'); reset(input); rewrite(output); readln(x1,y1,x0,y0,r); d := sqrt(sqr(x0-x1)+sqr(y0-y1)); if d<r then write(true) else write(false); close(input); close(output); end.
var a: longint; function chiahet(u: longint): boolean; var tam: longint; begin if (u mod 3 = 0) and (u mod 5 <> 0) then tam := true else tam := false; exit(tam); end; begin assign(input,'day1bai3.inp'); reset(input); assign(output,'day1bai3.out'); rewrite(output); readln(a); write(chiahet(a)); end.
var a,b,c: longint; function snn(x,y,z: longint): longint; var res: longint; begin res := x; if res>y then res := y; if res>z then res := z; exit(res); end; begin assign(input,'day1bai4.inp'); reset(input); assign(output,'day1bai4.out'); rewrite(output); readln(a,b,c); write(snn(a,b,c)); close(input); close(output); end.
var a,b,c: longint; function ktratg(x,y,z: longint): boolean; var tam: boolean; begin if (x+y>z) and (y+z>x) and (x+z>y) then tam := true else tam := false; exit(tam); end; function dientich(x,y,z: longint): real; var p,s: real; begin p := (x+y+z)/2; s := sqrt(p*(p-x)*(p-y)*(p-z)); exit(s); end; begin assign(input,'day1bai5.inp'); reset(input); assign(output,'day1bai5.out'); rewrite(output); readln(a,b,c); if (ktratg(a,b,c))=true then write(dientich(a,b,c):0:2) else write('none'); close(input); close(output); end.
var n: longint; function tinhtong(u: longint): real; var i: longint; tong: real; begin tong := 0; for i := 1 to u do tong := tong + 1/(2*i-1); exit(tong); end; begin assign(input,'day1bai6.inp'); reset(input); assign(output,'day1bai6.out'); rewrite(output); readln(n); write(tinhtong(n):0:3); close(input); close(output); end.