n = int(input("Nhập n: "))

a = [ ]

for i in range(n):

     a.append(int(input(f"Nhập phần tử a[{i}]: ")))

k = int(input("Nhập k: "))

count_greater = 0

count_divisible_by_three = 0

for num in a:

     if num > k:

          count_greater += 1

     if sum(int(digit) for digit in str(num)) % 3 == 0:

          count_divisible_by_three += 1

print(f"Số lớn hơn {k}: {count_greater} số")

print(f"Số có tổng các chữ số chia hết cho 3: {count_divisible_by_three} số")

Program HOC24;

var tg,t,n: integer;

begin

write('Nhap N: '); readln(n);

t:=0;

while n<>0 do

begin

tg:=n mod 10;

t:=t+tg;

n := n div 10;

end;

write('Tong cac chu so cua ',n,' la: ', t);

readln

end.

giúp với

#include <bits/stdc++.h>

using namespace std;

string st;

int d,i,dem;

int main()

{

cin>>st;

d=st.length();

dem=0;

for (i=0; i<d; i++)

if (st[i]=='0') dem++;

cout<<dem;

return 0;

}

Var n,dem:longint;

Begin

Write('Nhap so n = ');readln(n);

While n >= 10 do

Begin

if n mod 10 = 0 then dem:=dem+1;

n:=n div 10;

End;

Write('So vua nhap co ',dem,' so 0');

Readln;

End.

Tổng n số tự nhiên đầu tiên:

Var i,n,s:integer;

Begin

Write('n = ');

for i:=1 to n do

s:=s+i;

Write('Tong la ',s);

Readln

End.

Tích các số từ 5 đến 30

Var i,p:longint;

Begin

p:=1;

For i:=5 to 30 do

P:=p*i;

Write('Tich la ',p);

Readln

End.

Chu vi, diện tích hình chữ nhật:

var a,b,p,s:real;

begin

write('Chieu dai hcn = ');readln(a);

write('Chieu rong hcn = ');readln(b);

p:=(a+b)*2;

s:=a*b;

writeln('Chu vi hcn la ',p:10:2);

write('Dien tich hcn la ',s:10:2);

readln

end.

------------------------------------------------------------

Chu vi, diện tích hình tròn:

var r,c,s:real;

begin

write('Ban kinh = ');readln(r);

c:=2*3.14*r;

s:=3.14*r*r;

writeln('Chu vi hinh tron la ',c:10:2);

write('Dien tich hinh tron la ',s:10:2);

readln

end.

---------------------------------------------------

Chu vi, diện tích hình thang:

var dl,dn,cb1,cb2,h,p,s:real;

begin

write('Day lon = ');readln(dl);

write('Day be = ');readln(db);

write('Chieu cao = ');readln(h);

write('Canh ben thu nhat = ');readln(cb1);

write('Canh ben thu hai = ');readln(cb2);

p:=dl+db+cb1+cb2;

s:=(dl+db)*h/2;

writeln('Chu vi hinh thang la ',p:10:2);

write('Dien tich hinh thang la ',s:10:2);

readln

end.

uses crt;
var x,y,z,n : integer;
begin clrscr;
write('Nhap n:'); readln(n);
for x:=1 to 9 do
for y:=0 to 9 do
for z:=0 to 9 do
if n*(x+y+z) = x*100+y*10+z then
write('So thoa man de la :', x,y,z, ' ');
readln
end.

uses crt;

var n,i,d,x,j,tam:longint;

a:array[1..11]of integer;

st:string;

begin

clrscr;

repeat

write('Nhap n='); readln(n);

until n>0;

str(n,st);

d:=length(st);

for i:=1 to d do 

  begin

val(st[i],a[i],x);

end;

for i:=1 to d-1 do 

  for j:=i+1 to d do 

if a[i]<a[j] then 

begin

tam:=a[i];

a[i]:=a[j];

a[j]:=tam;

end;

for i:=1 to d do 

  write(a[i]);

readln;

end.

program tim_chu_so;

uses crt;

var i,n,csln:longint;

k:integer;

a:array[1..1000]of longint;

st:string;

begin

clrscr;

write('nhap so n:');readln(n);

str(n,st);

val(st,a[i]);

csln:=a[1];

for i:=1 to length(st) do

if csln<a[i] then csln:=a[i];

writeln('chu so lon nhat cua so ',n,' la:',csln);

readln;

end.

Câu 1: 

uses crt;

var n,i,d,x,y,max:integer;

st:string;

begin

clrscr;

write('Nhap n='); readln(n);

str(n,st);

d:=length(st);

max:=0;

for i:=1 to d do 

  begin

val(st[i],x,y);

if max<x then max:=x;

end;

writeln('Chu so lon nhat la: ',max);

readln;

end. 

Câu 2: 

uses crt;

var a,b,i,bcnn:longint;

begin

clrscr;

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

bcnn:=a*b;

for i:=a*b-1 downto 1 do 

  if (i mod a=0) and (i mod b=0) then 

begin

if bcnn<i then bcnn:=i;

end;

writeln('Boi chung nho nhat la: ',bcnn);

readln;

end.

Mình sẽ tạm hiểu đề này là viết chương trình in ra các số nguyên tố lớn hơn hoặc bằng n nha

#include <bits/stdc++.h>

using namespace std;

int n,m,i;

//chuongtrinhcon

bool ktnt(int n)

{ 

if (n<2) return false; 

for (int i=2; i*i<=n; i++) 

if (n%i==0) return false; 

return true;

}

int main()

{

cin>>n;

cout<<"Cac so nguyen to nho hon bang n thoa man yeu cau la"<<endl;

for (int i=2; i<=n; i++) 

if (ktnt(i)) cout<<i<<" ";

}

uses crt;var n: longint;    chrn: string;    valn,sum,max,i,preperror: byte;begin    write('Nhap so can kiem tra: ');    readln(n);    str(n,chrn);    for i:=1 to length(chrn) do    begin        val(chrn[i],valn,preperror);        sum:=sum+valn;        if max<valn then max:=valn;        valn:=0    end;    writeln('Ket qua: ');    writeln(length(chrn));    writeln(sum);    write(max);    readln;end.uses crt;var n: longint;    chrn: string;    valn,sum,max,i,preperror: byte;begin    write('Nhap so can kiem tra: ');    readln(n);    str(n,chrn);    for i:=1 to length(chrn) do    begin        val(chrn[i],valn,preperror);        sum:=sum+valn;        if max<valn then max:=valn;        valn:=0    end;    writeln('Ket qua: ');    writeln(length(chrn));    writeln(sum);    write(max);    readln;end.

Program HOC24;

var N:longint;

max,tg,t,d: integer;

Begin

write('Nhap N : '); readln(N);

max:=0;

while n<>0 do

begin

tg:=n mod 10;

d:=d+1;

t:=t+tg;

if tg>max then max:=tg;

n:=n div 10;

end;

writeln('So nguyen N co ',d,' chu so');

writeln('Tong cac chu so cua N la : ',t);

write('Chu so lon nhat cua N la :',max);

readln

end.

uses crt;

var n,d,i,t,max,x:longint;

y:integer;

st:string;

begin

clrscr;

repeat

write('Nhap n='); readln(n);

until n>0;

str(n,st);

d:=length(st);

writeln('So chu so cua ',n,' la: ',d);

t:=0;

max:=0;

for i:=1 to d do 

  begin

val(st[i],x,y);

t:=t+x;

if max<x then max:=x;

end;

writeln('Tong cac chu so cua ',n,' la: ',t);

writeln('Chu so lon nhat cua ',n,' la: ',max);

readln;

end.