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#include <bits/stdc++.h>
using namespace std;
int diaphuong(int n) {
if (n<2) {
return 0;
}
int squareRoot = (int) sqrt(n);
int i;
for(int i=2; i<=squareRoot; i++) {
if(n%i==0) {
return 0;
}
}
return 1;
}
int main() {
int i, N;
cin >> N;
for(int i=0; i<=N; i++) {
if(diaphuong(i)) {
cout << i << endl;
}
}
}
Chúc bn học tốt!
#include <bits/stdc++.h>
using namespace std;
long long a[100],n,i,t,t1,dem,dem1;
//chuongtrinhcon
bool ktnt(long long x)
{
if (x<=1) return(false);
for (int i=2; i*i<=x; i++)
if (x%i==0) return(false);
return true;
}
//chuongtrinhchinh
int main()
{
cin>>n;
for (i=1; i<=n; i++)
{
cin>>a[i];
}
for (i=1; i<=n; i++) cout<<a[i]<<" ";
cout<<endl;
t=0;
for (i=1; i<=n; i++) if (a[i]%2==0) t=t+a[i];
cout<<t<<endl;
dem=0;
for (i=1; i<=n; i++) if (a[i]%3==0) dem++;
cout<<dem<<" ";
t1=0;
dem1=0;
for (i=1; i<=n; i++)
if (a[i]%2!=0)
{
t1+=a[i];
dem1++;
}
cout<<fixed<<setprecision(2)<<(t1*1.0)/(dem1*1.0)<<endl;
for (i=1; i<=n; i++)
if (ktnt(a[i])==true) cout<<a[i]<<" ";
return 0;
}
#include <bits/stdc++.h>
using namespace std;
int n,t,i;
int main()
{
cin>>n;
t=1;
for (int i=1; i<=n; i++)
if (i%2==0) t*=i;
cout<<t;
}
#include <bits/stdc++.h>
using namespace std;
long long i,n,dem;
int main()
{
cin>>n;
dem=0;
for (i=1; i<=n; i++)
if (i%2==1 && i%5==0) dem++;
cout<<dem;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long n,i,x,dem,t;
int main()
{
cin>>n;
dem=0;
t=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x%3==0)
{
dem++;
t+=x;
}
}
cout<<dem<<" "<<t;
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.
Bài 1:
Program HOC24;
var i,n,d : byte;
t: integer;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
for i:=1 to n do if (a[i] mod 3=0) and (a[i] mod 5=0) then
begin
d:=d+1;
t:=t+a[i];
end;
writeln('Co ',d,' phan tu la boi cua 3 va 5');
write('Tong la: ',t);
readln
end.
Bài 2:
Program HOC24;
var i,n,k : byte;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
write('Nhap k: '); readln(k);
for i:=1 to n do if a[i]=k then d:=d+1;
writeln('Co ',d,' phan tu bang ',k);
Write('Cac chi so do la: ');
for i:=1 to n do if a[i]=k then write(i,' ');
readln
end.
chịu
Python:
n=int(input("Nhap so nguyen duong n:"))
dem=0
for i in range(1,n+1):
if i%4==0:
dem=dem+1
print(dem)