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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.
#include <bits/stdc++.h>
using namespace std;
long long a[1000],i,n,t,dem,s;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
t=0;
for (i=1; i<=n; i++)
if (a[i]%2==0) t+=a[i];
cout<<t<<endl;
dem=0;
for (i=1; i<=n; i++)
if (a[i]%5==2) dem++;
cout<<dem<<endl;
s=1;
for (i=1; i<=n; i++)
if (a[i]%7==3) s*=a[i];
cout<<s;
return 0;
}
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 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;
long long n,i,x;
int main()
{
cin>>n;
long long t=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x%3==0) t=t+x;
}
cout<<t;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long a[1000],n,i,dem,t,j,t1;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++) cout<<a[i]<<" ";
cout<<endl;
dem=0;
for (i=1; i<=n; i++)
{
t=0;
for (j=1; j<=a[i]-1; j++)
if (a[i]%j==0) t+=j;
if (t==a[i]) dem++;
}
cout<<dem<<endl;
t1=0;
for (i=1; i<=n; i++)
if (a[i]%2==0) t1+=a[i];
cout<<t1;
return 0;
}
#include <bits/stdc++.h>
using namespace std;
int n,A[100],i,k,t;
int main()
{
cin>>n>>k;
for (int i=1; i<=n; i++) cin>>A[i];
t=0;
for (int i=1; i<=n; i++)
if (A[i]%k==0) t+=A[i];
cout<<t;
}
