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.

Pascal hay C++ vậy???

#include <bits/stdc++.h>

using namespace std;

long long n,i,a[10000];

int main()

{

cin>>n;

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

cin>>a[i];

for (i=1; i<=n; i++) cout<<a[i]<<" ";

return 0;

}

Program HOC24;

var i,n: integer;

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

t: longint;

begin

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

for i:=1 to n do

begin

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

end;

t:=0;

for i:=1 to n do if a[i] mod 2=0 then t:=t+a[i];

write('Tong cac so chan trong mang la: ',t);

readln

end.

uses crt;

var a,i,t:integer;

      N: array[1..300] of integer;

begin

clrscr;

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

t:=0;

for i:=1 to a do

begin

writeln('N[',i,']= '); readln(N[i]);

if N[i] mod 2<>0 then t:=t+N[i];

end;

writeln('tong cac so le trong mang la: ',t);

readln;

end.

uses crt;

var a:array[1..300]of integer;

i,n,t:integer;

begin

clrscr;

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

for i:=1 to n do 

 begin

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

end;

t:=0;

for i:=1 to n do 

  if a[i] mod 2<>0 then t:=t+a[i];

writeln(t);

readln;

end.

uses crt;
var a:array[1..90] of longint;
    n,i:integer;
begin
    clrscr;
    write('Nhap so luong phan tu (n<=90): '); readln(n);
    for i:=1 to n do
        begin
            write('Nhap phan tu thu ',i,': '); readln(a[i]);
        end;
    write('Cac so chan: ');
    for i:=1 to n do if a[i] mod 2=0 then write(a[i],' ');
    readln;
end.

uses crt;

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

i,n,dem:integer;

begin

clrscr;

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

for i:=1 to n do 

 begin

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

end;

dem:=0;

for i:=1 to n do 

if a[i] mod 2=0 then inc(dem);

writeln(dem);

readln;

end.

Câu 1: 

uses crt;

var a:array[1..500]of integer;

i,n,t:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

  end;

t:=0;

for i:=1 to n do 

  if (a[i]<0) and (a[i] mod 7=0) then t:=t+a[i];

writeln('Tong cac so am chia het cho 7 la: ',t);

readln;

end.

Câu 2: 

uses crt;

var c,a:array[1..10]of integer;

i,kt,j,dem:integer;

begin

clrscr;

for i:=1 to 10 do 

  begin

write('C[',i,']='); readln(c[i]);

end;

dem:=0;

for i:=1 to 10 do 

  if c[i]>1 then 

begin

kt:=0;

for j:=2 to c[i]-1 do 

  if c[i] mod j=0 then kt:=1;

if kt=0 then 

begin

inc(dem);

a[dem]:=c[i];

end;

end;

if dem=0 then writeln('Trong day khong co so nguyen to')

else begin

writeln('Cac so nguyen to trong day la: ');

for i:=1 to dem do

write(a[i]:4);

end;

readln;

end.

Câu 3: 

uses crt;

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

i,k,dem:integer;

begin

clrscr;

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

for i:=1 to k do 

  begin

write('D[',i,']='); readln(d[i]);

end;

dem:=0;

for i:=1 to k do 

  if (a[i] mod 2=0) and (a[i]>=10) then inc(dem);

writeln('So phan tu chan co 2 chu so la: ',dem);

readln;

end.