![](https://rs.olm.vn/images/avt/0.png?1311)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Program bai1;
uses crt;
var a: array [1. .1000] of integer;
i,n,dem: integer;
begin clrscr;
write('nhap n = ');
readln(n);
for i:= 1 to n do begin write('nhap a[',i,'] = ');
readln(a[i]);
end;
dem:= 0;
for i:= 1 to n do if a[i] < 0 then dem:= dem+1; write('so luong cac so am la : ',dem);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var a:array[1..100]of integer;
i,n,k:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
write('Nhap k='); readln(k);
for i:=1 to n do
if a[i] mod k=0 then write(a[i]:4);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long a[1000],i,n,t,dem;
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;
t=0;
for (i=1; i<=n; i++)
if (a[i]>0)
{
dem++;
t=t+sqrt(a[i]);
}
cout<<t;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var a:array[1..1000]of integer;
i,n,dem,t:integer;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (0<n) and (n<=1000);
for i:=1 to n do
begin
repeat
write('A[',i,']='); readln(a[i]);
until abs(a[i])<=1000;
end;
for i:=1 to n do
write(a[i]:4);
writeln;
dem:=0;
for i:=1 to n do
if a[i]=0 then inc(dem);
writeln('So phan tu bang 0 la: ',dem);
t:=0;
for i:=1 to n do
if a[i] mod 2=0 then t:=t+a[i];
writeln('Tong cac phan tu chan la: ',t);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var a:array[1..250]of integer;
i,n,tam,j:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
for i:=1 to n-1 do
for j:=i+1 to n do
if a[i]>a[j] then
begin
tam:=a[i];
a[i]:=a[j];
a[j]:=tam;
end;
for i:=1 to n do
write(a[i]:4);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
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.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
int a[100],i,n,dem;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
dem=0;
for (i=1; i<=n; i++) if (a[i]%2!=0) dem++;
cout<<dem;
return 0;
}
Xét tổng vô hạn:
Sn=0,2+0,07+0,007+0,0007+...Sn=0,2+0,07+0,007+0,0007+...
Sn=15+7100+71000+710000+...Sn=15+7100+71000+710000+...
Sn=15+7100(1+110+1102+...)Sn=15+7100(1+110+1102+...)
Sn=15+7100.11−110=518Sn=15+7100.11−110=518
Vậy 0,277777...=518