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#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];
t=0;
dem=0;
for (i=1; i<=n; i++)
if ((a[i]>0) and (i%2==1))
{
t+=a[i];
dem++;
}
cout<<fixed<<setprecision(2)<<(t*1.0)/(dem*1.0);
return 0;
}
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..250]of integer;
i,n,dem,t,t1,t2,t3,t4:integer;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (0<n) and (n<=250);
for i:=1 to n do
begin
repeat
write('A[',i,']='); readln(a[i]);
until (0<a[i]) and (a[i]<=500);
end;
dem:=0;
for i:=1 to n do
if a[i] mod 2=1 then inc(dem);
writeln('So phan tu co gia tri le la: ',dem);
t:=0;
for i:=1 to n do
if i mod 2=0 then t:=t+a[i];
writeln('Tong cac phan tu co chi so chan la: ',t);
t1:=0;
for i:=1 to n do
if i mod 2=1 then t1:=t1+a[i];
writeln('Tong cac phan tu co chi so le la: ',t1);
t2:=0;
for i:=1 to n do
if (i mod 2=0) and (a[i] mod 2=0) then t2:=t2+a[i];
writeln('Tong cac phan tu chan co chi so chan la: ',t2);
t3:=0;
for i:=1 to n do
if (i mod 2=1) and (a[i] mod 2=1) then t3:=t3+a[i];
writeln('Tong cac phan tu co chi so le la: ',t3);
t4:=0;
for i:=1 to n do
t4:=t4+a[i];
writeln('Trung binh cong cac so trong day la: ',t4/n:4:2);
readln;
end.
Var a:array[1..100] of integer;
i,d1,d2:integer;
Begin
For i:=1 to 100 do
Begin
Write('Nhap phan tu thu ',i);readln(a[i]);
End;
For i:=1 to 100 do
If a[i] mod 2 = 0 then d1:=d1+1
Else d2:=d2+1;
Writeln('So phan tu chan la ',d1);
Write('So phan tu le la ',d2);
Readln;
End.
uses crt;
var n,i,a[100],dem1,dem2:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
dem1:=0;
dem2:=0;
for i:=1 to n do
begin
if a[i] mod 2=0 then inc(dem1)
else inc(dem2);
end;
writeln(dem1,' ',dem2);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long n,i,a[1000],t,dem,t1;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++)
if (a[i]%2==0) cout<<a[i]<<" ";
cout<<endl;
t=0;
dem=0;
for (i=1; i<=n; i++)
if (a[i]%2==0)
{
t=t+a[i];
dem++;
}
cout<<fixed<<setprecision(2)<<(t*1.0)/(dem*1.0)<<endl;
t1=0;
for (i=1; i<=n; i++)
if (a[i]%2!=0 || a[i]%3==0) t1+=a[i];
cout<<t1;
return 0;
}
uses crt;
var a:array[1..100]of integer;
i,n,dem,t:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
writeln('Cac so chan la: ');
dem:=0;
t:=0;
for i:=1 to n do
if a[i] mod 2=0 then
begin
write(a[i]:4);
t:=t+a[i];
inc(dem);
end;
writeln('Tong cac so chan la: ',t);
writeln('Trong day co ',dem,' so chan');
readln;
end.
program BaiToanMang;
var
A: array[1..100] of integer;
N, i, demChan, tongLeChia3: integer;
begin
write('Nhap so phan tu cua mang: ');
readln(N);
writeln('Nhap cac phan tu cua mang: ');
for i := 1 to N do
begin
write('a[', i, ']= ');
readln(A[i]);
end;
tongLeChia3 := 0;
for i := 1 to N do
begin
if (A[i] mod 2 = 1) and (A[i] mod 3 = 0) then
begin
tongLeChia3 := tongLeChia3 + A[i];
end;
end;
writeln('Tong cac so le chia het cho 3: ', tongLeChia3);
demChan := 0;
for i := 2 to N do
begin
if (A[i] mod 2 = 0) and (i mod 2 = 1) then
begin
demChan := demChan + 1;
end;
end;
writeln('So phan tu chan o vi tri le: ', demChan);
writeln('Cac so chan chia het cho 5: ');
for i := 1 to N do
begin
if (A[i] mod 2 = 0) and (A[i] mod 5 = 0) then
begin
write(A[i], ' ');
end;
end;
end.
ko bt đúng ko ko dùng pascal nhiều
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.
uses crt;
var a:array[1..100]of integer;
i,n,dem,dem1,dem2,t:integer;
s:real;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
repeat
write('A[',i,']='); readln(a[i]);
until a[i]>0;
end;
for i:=1 to n do
write(a[i]:4);
writeln;
dem:=0;
for i:=1 to n do
if a[i]>10 then inc(dem);
writeln('So phan tu lon hon 10 la: ',dem);
dem1:=0;
dem2:=0;
for i:=1 to n do
begin
if a[i] mod 2=0 then inc(dem1)
else inc(dem2);
end;
writeln('So luong so chan la: ',dem1);
writeln('So luong so le la: ',dem2);
t:=0;
s:=1;
for i:=1 to n do
begin
if (i mod 2=0) and (a[i] mod 2<>1) then t:=t+a[i];
if (i mod 2=1) and (a[i] mod 2=0) then s:=s*a[i];
end;
writeln('Tong cac so o vi tri chan co gia tri le la: ',t);
writeln('Tich cac so o vi tri le co gia tri chan la: ',s:4:2);
writeln('Cac so le la: ');
for i:=1 to n do
if a[i] mod 2<>0 then write(a[i]:4);
writeln;
writeln('Cac so chan va lon hon 10 la: ');
for i:=1 to n do
if (a[i] mod 2=0) and (a[i]>10) then write(a[i]:4);
readln;
end.
Thank you