Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

Bài 1: 

#include <bits/stdc++.h>

using namespace std;

long long a[250],i,n,k;

int main()

{

cin>>n>>k;

for (i=1; i<=n; i++)

cin>>a[i];

for (i=1; i<=n; i++)

if (a[i]==k) cout<<i<<" ";

return 0;

}

cau 1:

uses crt;

var a:array[1..100] of integer;

n,i,min: integer;

begin

readln(n);

for i:=1 to n do

readln(a[i]);

min:=a[1];

for i:=2 to n do

if min>a[i] then min=a[i];

writeln(a[i]);

readln;

end.

cau 2:

uses crt;

g:text;

s:string;

const fo='CHUSO.TXT'

begin

assign(g,fo);

rewrite(g);

readln(s);

for i:=1 to length(s) do

if not((s[i] in ['a'..'z'])and(s[i] in ['A'..'Z])) then delete(s,i,1);

writeln(g,s);

end.

1.

Program Tim_Max; 
Var A:Array[1..255] of Integer; 
i, n, Max: Integer; 
Begin 
Write('Nhap n: '); Readln(n); 
For i := 1 to n do 
Begin 
Write('Nhap phan tu A[',i,'] = '); Readln(A[i]); 
End; 
Max := A[1]; 
For i := 2 to n do if A[i]>Max then Max := A[i]; 
Write('Phan tu lon nhat la :',Max); 
Readln 
End.

2.

Uses Crt;
Type Mang = ARRAY[1..50] Of Integer;
Var A:Mang;
N,i,j,Tam:Integer;
Begin
{Nhập mảng}
Write('Nhap N='); Readln(N);
For i:=1 To N Do
Begin
Write('A[',i,']='); Readln(A[i]);
End;
{Sắp xếp}
For i:=1 To N-1 Do
For j:=i+1 To N Do
If A[i]>A[j] Then
Begin
Tam:=A[i]; A[i]:=A[j]; A[j]:=Tam;
End;
{In kết quả ra màn hình}
Writeln('Ket qua sau khi sap xep:');
For i:=1 To N Do Write(A[i]:5);
Readln;
End.

3.

Uses Crt;
Type Mang = ARRAY[1..50] Of Integer;
Var A:Mang;
N,i,x:Integer;

Function TimKiem(x, N: Integer; A:Mang):Integer;
Var i:Integer;
Begin
I:=1;
While (I <= N) and (X<>A[I]) do I:=I+1; {{{{tại sao lại phải làm như bước này, tại sao lại lấy i đi so sánh với N}}}}
If I <= N Then Timkiem:=I Else Timkiem:=0;
End;

Begin
{Nhập mảng}
Write(‘Nhap N=’); Readln(N);
For i:=1 To N Do
Begin
Write(‘A[‘,i,’]=’); Readln(A[i]);
End;
Write(‘Nhap X=’); Readln(x);
{Kết quả tìm kiếm}
If TimKiem(X,N,A)<>0 Then 
Writeln(‘Vi tri cua X trong mang la:’, TimKiem(X,N,A))
Else Writeln(‘X khong co trong mang.’);
Readln;
End.

câu 1 tham khảo cái này nhé

Uses Crt;

Type Mang = ARRAY[1..50] Of Integer;

Var A:Mang;

    N,i,Max:Integer;

Begin

    Write('Nhap N='); Readln(N);

    For i:=1 To N Do

        Begin

            Write('A[',i,']='); Readln(A[i]);

        End;

    Max:=A[1];

    For i:=2 To N Do

    If Max<A[i] Then Max:=A[i];

    Writeln('Phan tu lon nhat cua mang:', Max);

    Readln;

End.

uses crt;

var a:array[1..200]of integer;

n,i,k,t,t1:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

write('A[',i,']='); readln(a[i]);

end;

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

t:=0;

for i:=1 to n do 

  if a[i] mod 2<>0 then t:=t+a[i];

t1:=0;

for i:=1 to n do 

  if a[i] mod k=0 then t1:=t1+a[i];

writeln('Tong cac phan tu le la: ',t);

writeln('Tong cac phan tu la boi cua ',k,' la: ',t1);

readln;

end.

program NhapMang;

var

      mang: array of integer;

      n, i: integer;

begin

      write('Nhap so phan tu cua mang: ');

      readln(n);

      setlength(mang, n);

      writeln('Nhap cac phan tu cua mang:');

      for i := 0 to n-1 do

      begin

            readln(mang[i]);

      end;

      writeln('Mang vua nhap la:');

      for i := 0 to n-1 do

      begin

      write(mang[i], ' ');

      end;

      readln;

end.

program NhapMang;
const
  MAXSIZE = 100; 
var
  a: array[1..MAXSIZE] of integer; 
  n, i: integer; 
begin
  write('Nhap so luong phan tu cua mang: ');
  readln(n); 
  for i := 1 to n do
  begin
    write('a[', i, '] = ');
    readln(a[i]);
  end;
  writeln('Mang vua nhap la:');
  for i := 1 to n do
    write(a[i], ' ');
end.

uses crt;

var a:array[1..100]of integer;

i,n:integer;

begin

clrscr;

readln(n);

for i:=1 to n do readln(a[i]);

for i:=1 to n do write(a[i]:4);

writeln;

writeln('Phan tu thu hai la: ',a[2]);

readln;

end.