Program Ulesanne3_a;

 

Var f: longint;

       i,n: byte;

 

Begin

    Writeln('Sisestage üks naturaalarv: ');

    Readln(n);

 

    f := 0;

 

    for i := 1 to n do

        f := f + i;

 

    Writeln('Summa on ', f);

    Readln;

End.

 

 

 

 

Program Ulesanne3_b;

 

Var f: longint;

       i,n,q: byte;

 

Begin

    Writeln('Sisestage üks naturaalarv: ');

    Readln(n);

 

    f := 0;

 

    for i := 1 to n do

       begin

          Writeln('Sisestage üks naturaalarv (', i, '):'); 

          readln(q);

          f := f + q;

       end;

 

    Writeln('Summa on ', f);

    Readln;

End.

 

 

 

 

Program Ulesanne3_c;

 

Var f: longint;

       i,n,q: byte;

 

Begin

    Writeln('Sisestage üks naturaalarv: ');

    Readln(n);

 

    f := 0;

 

    for i := 1 to n do

       begin

          Writeln('Sisestage üks naturaalarv (', i, '):'); 

          readln(q);

          f := f + q;

       end;

 

    Writeln('Keskmine on ', f/n:10:3);

    Readln;

 

End.

 

 

 

 

Program Ulesanne3_d;

 

Var f: real;

       i,n,q: byte;

 

Begin

    Writeln('Sisestage üks naturaalarv: ');

    Readln(n);

 

    f := 0;

 

    for i := 1 to n do

       f := f + 1/(1+i*i);

 

    Writeln('Summa on ', f:5:2);

    Readln;

 

End.

 

 

 

 

Program Ulesanne3_e;

 

Var f: real;

       i,n,q: byte;

 

Begin

    Writeln('Sisestage üks naturaalarv: ');

    Readln(n);

 

    f := 1;

 

    for i := 1 to n do

       f := f * (i+1)/2;

 

    Writeln('Summa on ', f:5:2);

    Readln;

End.