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uses crt;
var a:array[1..100]of integer;
i,n,kt,dem,j: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 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;
break;
end;
if kt=0 then inc(dem);
end;
writeln('So phan tu la so nguyen to la: ',dem);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long x,n,i,t;
int main()
{
cin>>n;
t=0;
for (i=1; i<=n; i++)
{
cin>>x;
if (x>0) t+=x;
}
cout<<t;
return 0;
}
uses crt;
var a:array[1..100]of integer;
i,n,dem:integer;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (1<=n) and (n<=1000);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
writeln('Mang ban vua nhap la: ');
for i:=1 to n do
write(a[i]:4);
writeln;
dem:=0;
for i:=1 to n do
if a[i] mod 3=0 then inc(dem);
writeln('So phan tu chia het cho 3 la: ',dem);
readln;
end.
uses crt;
var a:array[1..100]of integer;
i,n,min,dem:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
min:=a[1];
for i:=1 to n do
if min>a[i] then min:=a[i];
dem:=0;
for i:=1 to n do
if min=a[i] then inc(dem);
writeln('So phan tu co gia tri nho nhat la: ',dem);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long b[20],i,n;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>b[i];
for (i=1; i<=n; i++)
{
if ((b[i]%2!=0) or (i%2==0)) cout<<b[i]<<" ";
}
return 0;
}
Bài 4:
#include <bits/stdc++.h>
using namespace std;
long long a[1000],i,n;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
sort(a+1,a+n+1);
cout<<"So lon nhat la: "<<a[n]<<endl;
cout<<"So nho nhat la: "<<a[1]<<endl;
cout<<"So lon thu hai la: "<<a[n-1]<<endl;
cout<<"So nho thu hai la: "<<a[2];
return 0;
}
#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;
}
#include <bits/stdc++.h>
using namespace std;
long long a[1000],n,i,t,dem,s;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
t=0;
dem=0;
s=1;
for (i=1; i<=n; i++)
{
if (a[i]%2==0) t+=a[i];
if (a[i]%5==2) dem++;
if (a[i]%7==3) s*=a[i];
}
cout<<t<<endl;
cout<<dem<<endl;
cout<<s;
return 0;
}