uses crt;

const fi='bt.txt'

fo='soam.txt'

var f1,f2:text;

a:array[1..100]of integer;

i,n:integer;

begin

clrscr;

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

n:=0;

while not eoln(f1) do 

  begin

n:=n+1;

read(f1,a[n]);

end;

for i:=1 to n do 

begin

  if a[i]>0 then writeln('Can bac hai cua ',a[i],' la: ',sqrt(a[i]):4:2)

else if a[i]<0 then write(f2,a[i]:4);

end;

close(f1);

close(f2);

readln;

end.

#include <bits/stdc++.h>
using namespace std;
unsigned long long a[1000],i,n,uc;
//chuongtrinhcon
unsigned long long ucln(long long a,long long b)
{
    if (b==0) return(a);
    else return(ucln(b,a%b));
}
//chuongtrinhchinh
int main()
{
    freopen("sn3.inp","r",stdin);
    freopen("uc.out","w",stdout);
    cin>>n;

for (i=1; i<=n; i++) cin>>a[i];

uc=ucln(a[1],a[2]);

for (i=3; i<=n; i++)

uc=ucln(uc,a[i]);

cout<<uc;
    return 0;
}

uses crt;

const fi='input.txt'

fo='output.txt'

var f1,f2:text;

a,b:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

readln(f1,a,b);

if (a=0) and (b=0) then writeln(f2,'Phuong trinh co vo so nghiem');

if (a<>0) then writeln(f2,-b/a:4:2);

if (a=0) and (b<>0) then writeln(f2,'Phuong trinh vo nghiem');

close(f1);

close(f2);

end.

const fi='dulieu.txt'
fo='ketqua.txt'
var i,t:integer;
f1,f2:text;
a:array[1..9]of integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
t:=0;
for i:=1 to 9 do
begin
read(f1,a[i]);
t:=t+a[i];
end;
writeln(f2,t);
close(f1);
close(f2);
end.

s

const fi='dataln.txt'

fo='dataout.txt'

var f1,f2:text;

x,i,t:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

t:=0;

for i:=1 to 24 do 

begin

read(f1,x);

t:=t+x;

end;

writeln(f2,t);

close(f1);

close(f2);

end.

const fi='dataln.txt'

fo='dataout.txt'

var f1,f2:text;

x,i,t:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

t:=0;

for i:=1 to 24 do 

begin

read(f1,x);

t:=t+x;

end;

writeln(f2,t);

close(f1);

close(f2);

end.

const fi='data.txt'

fo='tbc.txt'

var f1,f2:text;

a:array[1..100]of integer;

n,i,t:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

n:=0;

while not eof(f1) do 

  begin

n:=n+1;

readln(f1,a[n]);

end;

t:=0;

for i:=1 to n do 

  t:=t+a[i];

writeln(f2,t/n:4:2);

close(f1);

close(f2);

end.