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![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='baitap.txt';
var f1:text;
a,b:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
readln(f1,a,b);
writeln('Chu vi hinh chu nhat la: ',(a+b)*2);
close(f1);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='baitap.txt';
var f1:text;
a,b:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
readln(f1,a,b);
writeln('Chu vi la: ',(a+b)*2);
writeln('Dien tich la: ',a*b);
close(f1);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long a,b;
//chuongtrinhcon
long long gcd(long long a,long long b)
{
if (b==0) return(a);
return gcd(b,a%b);
}
//chuongtrinhchinh
int main()
{
freopen("songuyen.inp","r",stdin);
cin>>a>>b;
cout<<gcd(a,b);
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='baitap.txt';
var f1:text;
a:array[1..5]of integer;
i:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
for i:=1 to 5 do readln(f1,a[i]);
for i:=1 to 5 do write(a[i]:4);
close(f1);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='nhap.txt';
uses crt;
var
f:text;
b:byte;
a:longint;
begin
clrscr;
assign(f,f1);
reset(f);
read(f,a,b);
close(f);
a:=exp(b*ln(a));
write('ket qua la: ',a);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long i,a[100],n;
int main()
{
freopen("songuyen.txt","r",stdin);
n=20;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++) cout<<a[i]<<" ";
return 0;
}
uses crt;
const fi='baitap.txt';
var f1:text;
a,b,c,d:array[1..100]of real;
i,n:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
n:=0;
while not eof(f1) do
begin
n:=n+1;
readln(f1,a[n],b[n],c[n],d[n]);
end;
for i:=1 to n do
writeln(sqrt(sqr(a[i]-c[i])+sqr(b[i]-d[i])):4:3);
close(f1);
readln;
end.