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#include <bits/stdc++.h>
using namespace std;
int main()
{
long long n,dem=0,s=0;
cin >> n;
for (long long i=1;i<=n;i+=2){
dem++;
s+=i;
}
cout << "tu 0 den n co: " << dem << " so le" << endl;
cout << "tong cac so le do la: " << s;
return 0;
#include <bits/stdc++.h>
using namespace std;
int main()
{
long long n,dem=0,s=0;
cin >> n;
for (long long i=1;i<=n;i+=2){
dem++;
s+=i;
}
cout << "tu 0 den n co: " << dem << " so le" << endl;
cout << "tong cac so le do la: " << s;
return 0;
}
var i,n,d:integer;
s:longint;
begin
write('n = ');readln(n);
for i:=1 to n do
if i mod 2 <> 0 then
begin
d:=d+1;
s:=s+i;
end;
writeln('co ',d,' so le');
write('tong cac so le la ',s);
readln;
end.
program DemSoChiaHetCho5;
var
n, i, count: integer;
begin
write('Nhap n: ');
readln(n);
i := 1;
count := 0;
while i <= n do
begin
if i mod 5 = 0 then
count := count + 1;
i := i + 1;
end;
writeln('Co ', count, ' so tu nhien chia het cho 5 trong khoang tu 1 den ', n);
end.
Uses Crt;
Var A : array [1..1000] of longint;
n, m, d, t, i, S, k : longint;
Begin
//Phan A
Clrscr;
Writeln(' Phan A ');
Write(' Ban hay nhap 1 so n bat ky: ');
Readln(n);
Write(' Cac so chia het cho ba tu 1 den ',n,' la: ');
For i:=1 to n do
If (i mod 3) = 0 then Write(' ',i);
//Phan B
Writeln;
Writeln(' Phan B ');
Write(' Ban hay nhap 1 so m bat ky: ');
Readln(m);
For i:=1 to m do
Begin
Write(' Ban hay nhap hang tu thu ',i,': ');
Readln(A[i]);
S:= S+A[i];
End;
Write(' Tong cua day so tren la: ',S);
//Phan C
Writeln;
Writeln(' Phan C ');
Write(' Ban hay nhap 1 so d bat ky: ');
Readln(d);
Write(' Ban hay nhap so K: ');
Readln(k);
For i:=1 to n do
Begin
Write(' Ban hay nhap hang tu thu ',i,': ');
Readln(A[i]);
If ((A[i] div k)=1)then t:=t+1;
End;
Write(' Co tat ca ',t,' so giong ',k);
Readln;
End.
program DemSoChiaHetCho5;
var
n, count, i: integer;
begin
write('Nhap vao so n: ');
readln(n);
count := 0;
i := 1;
while i <= n do
begin
if i mod 5 = 0 then // kiem tra so i co chia het cho 5 khong
count := count + 1;
i := i + 1;
end;
writeln('So luong so tu nhien chia het cho 5 tu 1 den ', n, ' la: ', count);
end.
1. Uses crt;
var n,i: integer;
begin clrscr;
readln(n);
for i:=1 to n do write(i:3);
readln;
end.
2. Uses crt;
var n,i: integer;
begin clrscr;
readln(n);
for i:=1 to n do if(i mod 2 = 0) then write(i:3);
readln;
end.
program Le_Nho_Hon_Hoac_Bang_n;
uses crt;
var
n, i: integer;
begin
clrscr;
write('Nhap vao mot so nguyen duong n: ');
readln(n);
while n <= 0 do
begin
writeln('So ban nhap khong hop le. Xin vui long nhap lai: ');
readln(n);
end;
clrscr;
writeln('Cac so le nho hon hoac bang ', n, ' la:');
i := 1;
while i <= n do
begin
if i mod 2 <> 0 then
writeln(i);
i := i + 1;
end;
readln;
end.
uses crt;
var n,i,dem,dem1,j,k,dem2,x:integer;
begin
clrscr;
write('nhap n='); readln(n);
dem:=0;
i:=1;
while i<=n do
begin
dem:=dem+1;
inc(i);
end;
writeln('So cac so tu nhien trong khoang tu 1 toi ',n,' la: ',dem);
dem1:=0;
j:=1;
while j<=n do
begin
if j mod 2=1 then inc(dem1);
inc(j);
end;
writeln('So cac so le trong khoang tu 1 toi ',n,' la: ',dem1);
if n>1 then
begin
k:=2;
dem2:=0;
repeat
x:=1;
repeat
inc(x);
until (k mod x=0) or (x=k);
if x=k then inc(dem2);
k:=k+1;
until k=n+1;
end;
writeln('So cac so nguyen to trong khoang tu 1 toi ',n,' la: ',dem2);
readln;
end.