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uses crt;
var a,b,l,r,i,dem:integer;
begin
clrscr;
readln(a,b,l,r);
dem:=0;
for i:=l to r do
if (i mod a=0) and (i mod b=0) then inc(dem);
write(dem);
readln;
end.
var a,b,dem,L,i,R:longint;
begin
readln(a,b,L,R);
dem:=0;
for i:=L to R do
if (i mod a=0) and (i mod b=0) then inc(dem);
write(dem);
readln;
end.
var a:array[1..1000] of integer;
i,n,d,max:integer;
begin
write('n = ');readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' = ');readln(a[i]);
if a[i] mod 2 <> 0 then d:=d+1;
end;
max:=a[1];
for i:=2 to n do
if a[i] > max then max:=a[i];
writeln('Co ',d,' so le');
write('So lon nhat la ',max);
readln
end.
uses crt;
var n,i,chan,tonchan:integer;
a:array[1..100] of integer;
begin
write('nhap n '); readln(n);
for i:=1 to n do
begin
write('a[i]='); readln(a[i]);
end;
writeln("in cac phan tu trong mang");
for i:=1 to n do
begin
writeln(a[i]);
end;
writeln("in cac phan tu chan");
chan:=0;
for i:=1 to n do
if n mod 2=0 then begin writeln(a[i]); chan:=chan+1; end;
write('tong cac phan tu chan ',chan);
readln;
end.
Program HOC24;
var i: integer;
function nt(x: integer): boolean;
var j: integer;
begin
nt:=true;
if (x=2) or (x=3) then exit;
nt:=false;
if (x=1) or (x mod 2=0) or (x mod 3=0) then exit;
j:=5;
while j<=trunc(sqrt(x)) do
begin
if (x mod j=0) or (x mod (j+2)=0) then exit;
j:=j+6;
end;
nt:=true;
end;
Begin
for i:= 10 to 99 do if nt(i) and i mod 2=0 then write(i,' ');
readln
end.
uses crt;
var n,i,dem,j,t:integer;
kt:boolean;
begin
clrscr;
readln(n);
t:=0;
for i:=2 to n do
begin
kt:=true;
for j:=2 to i-1 do
if i mod j=0 then kt:=false;
if kt=true then
begin
write(i:4);
t:=t+i;
end;
end;
writeln;
writeln(t);
readln;
end.
uses crt;
Var i,n,dem:integer;
a: array[1..1000] of integer;
Begin
clrscr;
Write('Nhap do dai cua day: ');readln(n);
dem:=0;
for i:= 1 to n do
Begin
write('So thu ',i,' = ');
readln(a[i]);
if a[i] mod 2 = 0 then inc(dem);
end;
Writeln('Day so co ',dem,' so chan');
readln;
End.