Представьте с развернутой записи числа

1)
#include <iostream>
using namespace std;

int main()
{
int n = 0;
cin >> n;
for (int i = 0; i < n; ++i) {
cout << 2 * i << endl;
}
return 0;
}
2)
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
int a = 0, b = 0;
cin >> a >> b;
for (int i = a; i <= b; ++i) {
cout << pow(i, 2) << endl;
}
return 0;
}
3)
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
int a = 0, b = 0, sum = 0;
cin >> a >> b;
for (int i = a; i <= b; ++i) {
sum += pow(i, 2);
}
cout << sum << endl;
return 0;
}

1)
var a,b,s:integer;
begin
Readln(a,b);
s:=0;
if (a<0)and(b<0) then
 begin a:=-a; b:=-b; end;
if a<0 then for var i:=1 to b do s+=a
else for var i:=1 to a do s+=b;
WriteLn(s);
end.

Пример:
-7 15
-105

2)
var n,s:integer;
begin
Readln(n);
s:=0;
for var i:=1 to n do s+=i;
WriteLn(s);
end.

Пример:
100
5050

3)
var a,b,s:integer;
begin
Readln(a,b);
s:=0;
for var i:=a to b do s:=s+i*i;
writeLn(s);
end.

Пример:
2 5
54

4)
var a,b,n:integer;
begin
Readln(a,b,n);
for var i:=1 to n do write(random(b-a+1)+a,' ');
end.

Пример:
10 20 5
11 12 14 14 18