Program HOC24;

var d,i,n: integer;

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

t: longint;

function nt(x: longint): boolean;

var j: longint;

begin

nt:=true;

if (x=2) or (x=3) then exit;

nt:=false;

if (x=1) or (x mod 2=0) or (x mod 3=0) then exit;

j:=5;

while j<=trunc(sqrt(x)) do

begin

if (x mod j=0) or (x mod (j+2)=0) then exit;

j:=j+6;

end;

nt:=true;

end;

begin

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

for i:=1 to n do

begin

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

end;

d:=0; t:=0;

for i:=1 to n do

if nt(a[i]) then

begin

d:=d+1;

t:=t+a[i];

end;

writeln('Co ',d,' so nguyen to trong day');

write('Tong cac so nguyen to trong day la: ',t);

readln

end.

uses crt;

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

i,n,dem,t,j,kt:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

end;

dem:=0;

t:=0;

for i:=1 to n do 

  if a[i]>1 then 

begin

kt:=0;

for j:=2 to a[i]-1 do 

 if a[i] mod j=0 then kt:=1;

if kt=0 then

begin

inc(dem);

t:=t+a[i];

end;

end;

writeln('So luong so nguyen to la: ',dem);

writeln('Tong cac so nguyen to la: ',t);

readln;

end.

uses crt;

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

i,n,tc,tl,t:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

end;

tc:=0;

tl:=0;

for i:=1 to n do 

  begin

if a[i] mod 2=0 then tc:=tc+a[i]

else tl:=tl+a[i];

end;

writeln('Tong cac so chan la: ',tc);

writeln('Tong cac so le la: ',tl);

t:=0;

for i:=1 to n do  

t:=t+a[i];

writeln('Tong cua day so la: ',t);

readln;

end. 

uses crt;

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

i,n,dem1,dem2,t1,dem3,j,kt:integer;

begin

clrscr;

readln(n);

for i:=1 to n do 

  readln(a[i]);

dem1:=0;

dem2:=0;

t1:=0;

for i:=1 to n do 

  begin

if a[i] mod 2=0 then 

begin

dem1:=dem1+1;

t1:=t1+a[i];

end;

else dem2:=dem2+1;

end;

dem3:=0;

for i:=1 to n do 

  if (a[i]>1) then 

begin

kt:=0;

for j:=2 to trunc(sqrt(a[i])) do 

  if a[i] mod j=0 then kt:=1;

if kt=0 then dem3:=dem3+1;

end;

writeln(dem1, ' ',dem2);

writeln(t1);

writeln(dem3);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long x,i,n,nn;

int main()

{

cin>>n;

int dem=0;

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

{

cin>>x;

if (x==0) dem++;

}

cout<<dem;

return 0;

}

Input:N nguyên dương ,dãy A gồm N số nguyên A1,A2,...An, số nguyên k

Output:- số lg các số bằng 0 trong dãy

- slg các số chẵn trong dãy

Tổng các số là bội của k trong dãy 

- số lg các số các số bằng k tong dãy

+minh hoạ: N=8

....

uses crt;

var i,n,x,dem,t,kt,j:integer;

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

begin

clrscr;

readln(n);

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

dem:=0;

t:=0;

for i:=1 to n do

 if a[i]>1 then 

begin

kt:=0;

for j:=2 to trunc(sqrt(a[i])) do

if a[i] mod j=0 then

begin

kt:=1;

end;

if kt=0 then

begin

dem:=dem+1;

t:=t+a[i];

end;

end;

writeln(dem);

writeln(t);

readln;

end.

#include <iostream>

#include <map>

using namespace std;

int main() {

       int n;

       cin >> n;

       map<int, int> count;

       for (int i = 0; i < n; i++) {

              int x;

              cin >> x;

              count[x]++;

       }

       int ans = 0;

       for (auto p : count) {

              int x = p.second;

              ans += (x * (x - 1)) / 2;

       }

       cout << ans;

       return 0;

}

A

const fi='dl.pas'

fo='qk.pas'

var f1,f2:text;

i,n,dem,t,dem1,dem2,kt,j:integer;

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

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

readln(f1,n);

for i:=1 to n do 

  read(f1,a[i]);

dem:=0;

for i:=1 to n do 

  if (a[i] mod 2<>0) and (a[i] mod 7=0) then inc(dem);

t:=0;

for i:=1 to n do

  if (10<=a[i]) and (a[i]<=30) then t:=t+a[i];

dem1:=0;

for i:=1 to n do 

  if (a[i]<0) and (a[i] mod 2<>0) then inc(dem1);

dem2:=0;

for i:=1 to n do 

  if a[i]>1 then

begin

kt:=0;

for j:=2 to a[i]-1 do 

  if a[i] mod j=0 then kt:=1;

if kt=0 then inc(dem2);

end;

writeln(f2,'So phan tu le chia het cho 7 la: ',dem);

writeln(f2,'Tong cac phan tu thuoc [10,30] la: ',t);

writeln(f2,'So cac phan tu am le la: ',dem1);

writeln(f2,'So phan tu la so nguyen to la: ',dem2);

close(f1);

close(f2);

end.

#include <bits/stdc++.h>

using namespace std;

long long n,i,x,dem;

int main()

{

cin>>n;

dem=0;

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

{

cin>>x;

if (x==50) dem++;

}

cout<<dem;

return 0;

}