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 (10<a[i]) and (a[i]<20) then inc(dem);

writeln(dem);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long x,n,i,t,dem;

int main()

{

cin>>n;

dem=0;

t=0;

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

{

cin>>x;

if (x%2==0 && x>10) t+=x;

if (x%2!=0 || x<100) dem++;

}

cout<<t<<" "<<dem;

return 0;

}

var a:array[1..1000] of integer;

i,n,min:integer;

s:longint;

begin

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

for i:=1 to n do

begin

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

s:=s+a[i];

end;

writeln('Tong la ',s);

min:=a[1];

for i:=2 to n do

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

write('Cac so chan la ');

for i:=1 to n do

if a[i] mod 2 = 0 then write(a[i]:8);

writeln;

write('so nho nhat la ',min);

readln

end.

program TinhTongSo;
uses crt;
var
  a: array [1..10] of integer;
  i, tong, dem: integer;
begin
  clrscr;
  writeln('Nhap day 10 so nguyen: ');
  for i := 1 to 10 do
  begin
    write('Nhap so thu ', i, ': ');
    readln(a[i]);
  end;
  writeln('Day so da nhap tren mot hang: ');
  for i := 1 to 10 do
    write(a[i], ' ');
  tong := 0;
  for i := 1 to 10 do
    if a[i] < 0 then
      tong := tong + a[i];
  writeln('Tong cac so nguyen am: ', tong);
  dem := 0;
  for i := 1 to 10 do
    if (a[i] > 6) and (a[i] < 9) then
      dem := dem + 1;
  writeln('So luong cac so thoa dieu kien "lon hon 6 va nho hon 9": ', dem);
  readln;
end.

program TimMinMaxTrungBinh;

var

      N, i, max, min, sum: integer;

      a: array[1..50] of integer;

      TB, minTB, maxTB: real;

begin

      writeln('Nhap so nguyen duong N:');

      readln(N);

      sum := 0;

      for i := 1 to N do

      begin

            write('Nhap so thu ', i, ': ');

            readln(a[i]);

            sum := sum + a[i];

      end;

      max := a[1];

      min := a[1];

      for i := 2 to N do

      begin

            if a[i] > max then

                  max := a[i];

            if a[i] < min then

                  min := a[i];

      end;

      TB := sum / N;

      minTB := TB;

      maxTB := TB;

      for i := 1 to N do

      begin

            if (a[i] < TB) and (a[i] < minTB) then

                  minTB := a[i];

            if (a[i] > TB) and (a[i] > maxTB) then

                  maxTB := a[i];

      end;

      writeln('Gia tri lon nhat la: ', max);

      writeln('Gia tri nho nhat la: ', min);

      writeln('Gia tri trung binh la: ', TB:2:2);

      if minTB = TB then

            writeln('Khong co gia tri nao nho hon TB')

      else

            writeln('Gia tri nho nhat < TB la: ', minTB);

      if maxTB = TB then

            writeln('Khong co gia tri nao lon hon TB')

      else

            writeln('Gia tri lon nhat > TB la: ', maxTB);

      readln;

end.

Program HOC24;

var n,d,i: integer;

B: array[1..100] of integer;

t: longint;

begin

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

for i:=1 to n do 

begin

write('B[',i,']='); readln(b[i]);

end;

d:=0; t:=0;

for i:=1 to n do 

if b[i]>0 then

begin

d:=d+1;

t:=t+b[i];

end;

writeln('Tong cac so duong trong day so la: ',t);

write('Co ',d,' so duong trong day');

readln

end.

uses crt;
var b:array[1..100] of longint;
      n,i,d,s:longint;
begin
      clrscr;
      write('n='); readln(n);
      for i:=1 to n do 
            begin
                  write('a[',i,']: '); readln(b[i]);
                  if b[i]>0 then begin
                        inc(d);
                        inc(s,b[i]);
                  end;
            end;
      writeln('Tong cac so duong: ',s);
      writeln('Co ',d,' so duong');
      readln;
end.

Cách 1 dùng lệnh for do:

Uses crt;

var i,n,k: integer;

begin clrcsr;

readln(n);

for i:=1 to n do begin

if(i mod 2=0) and (i>=10) then k:=k*i;

end;

writeln(k);

readln;

end.

Cách 2 dùng lệnh while do

Uses crt;

var m,n,o: integer;

begin clrcsr;

readln(n);

o:=1;

m:=1;

while (m<n) do begin

m:=m+1;

if(m mod 2=0) and (m>=10) then o:=o*m;

end;

writeln(o);

readln;

end.