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#include <bits/stdc++.h>
using namespace std;
long long a[1000],n,i,dem;
int main()
{
cin>>n;
dem=0;
for (i=1; i<=n; i++)
{
cin>>x;
if ((i%2==1) and (x%2==0)) dem++;
}
cout<<dem;
return 0;
}
a. Dựa trên mã lệnh thuật toán cho trong Hình 3.
b) Dựa trên mã lệnh thuật toán cho trong Hình 5.
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,dem:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
dem:=0;
for i:=1 to n do
if (trunc(sqrt(a[i]))=sqrt(a[i]) then dem:=dem+1;
writeln(dem);
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 a[20],i,j,dem;
bool kt;
int main()
{
for (i=1; i<=20; i++) cin>>a[i];
dem=0;
for (i=1; i<=20; i++)
if (a[i]>1)
{
kt=true;
for (j=2; j<=sqrt(a[i]); j++)
if (a[i]%j==0) kt=false;
if (kt==true) dem++;
}
cout<<dem;
return 0;
}
uses crt;
var a:array[1..10]of integer;
i,n,dem:integer;
begin
clrscr;
for i:=1 to 10 do
begin
repeat
write('A[',i,']='); readln(a[i]);
until a[i]>0;
end;
writeln('Day so vua nhap la: ');
for i:=1 to 10 do
write(a[i]:4);
dem:=0;
for i:=1 to n do
if a[i] mod 2=0 then inc(dem);
writeln;
writeln('So luong so chan la: ',dem);
readln;
end.
A