Bài 1:

#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) and (x%2!=0)) t=t+x;

}

cout<<t;

return 0;

}

 tách ra từng câu hỏi đi bro

Câu 1: 

uses crt;

var a:array[1..200]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] mod 2=0 then t:=t+a[i];

writeln(t);

readln;

end.

2:

uses crt;

var a:array[1..200]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:=1;

for i:=1 to n do 

  t:=t*a[i];

writeln(t);

readln;

end.

program XuatSoChan;
uses crt;
const
  Max_N = 20;
type
  MangSoNguyen = array [1..Max_N] of integer;
var
  A: MangSoNguyen;
  i, n: integer;
begin
  clrscr;
  write('Nhap so luong phan tu cua mang: ');
  readln(n);
  writeln('Nhap cac phan tu vao mang:');
  for i := 1 to n do
  begin
    write('A[', i, ']: ');
    readln(A[i]);
  end;
  writeln('Cac so chan trong mang la:');
  for i := 1 to n do
  begin
    if A[i] mod 2 = 0 then
      writeln(A[i]);
  end;
  readln;
end.

6:

#include <bits/stdc++.h>

using namespace std;

int main()

{

int n,A[100],i,dem=0;

cin>>n;

for (int i=1; i<=n; i++) cin>>A[i];

for (int i=1;i<=n; i++)

if (A[i]%2!=0) dem++;

cout<<dem;

return 0;

}

5:

#include <bits/stdc++.h>

using namespace std;

int main()

{

long long n,nn=1e6,A[1000];

cin>>n;

for (int i=1; i<=n; i++) cin>>A[i];

for (int i=1; i<=n; i++)

nn=min(nn,A[i]);

for (int i=1; i<=n; i++)

if (nn==A[i]) cout<<i<<" ";

return 0;

}

bạn tham khảo 

uses crt;

var a:array[1..200]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] mod 2=0 then t:=t+a[i];

writeln(t);

readln;

end.

var a:array[1..200] of integer;

i,n,dem1,dem2:integer;

begin

write('Nhap n = ');readln(n);

for i:=1 to n do

begin

write('Nhap phan tu thu ',i,' = ');readln(a[i]);

end;

dem1:=0;

dem2:=0;

for i:=1 to n do

begin

if i = n then write(a[i])

else write(a[i],' ');

if a[i] mod 2 = 0 then dem1:=dem1+1

else dem2:=dem2+1;

end;

writeln('So cac phan tu chan la ',dem1);

write('So cac phan tu le la ',dem2);

readln;

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;

}

var n,i: integer;

a:array[1..1000] of integer;

begin

write('Nhap so n: '); readln(n);

for i:=1 to n do

begin

write('a[',i,'] = '); readln(a[i]);

end;

for i:=1 to n do

if a[i] mod 2 = 0 then writeln(a[i]);

end.

program mang;
uses crt;
var n,i,chan, le,max,min: Integer;
a:array[1..100] of integer;
begin
write('nhap so phan tu ');read(n);
for i:=1 to n do
begin
write('nhap so thu ',i); readln(a[i]);
end;
max:=a[1]; min:=a[1]; chan:=0;le:=0;
for i:=1to n do
begin
if a[i] > max then max:=a[i];
if a[i] < min then min:=a[i];
if a[i] mod 2 = 0 then chan:=chan+1
else le:=le+1;
end;
writeln('max la: ',max);
writeln('min la: ',min);
writeln('so phan tu chan: ',chan);
writeln('so phan tu le: ',le);
readln
end.

Câu 1: 

uses crt;

var a:array[1..5]of integer;

max,i:integer;

begin

clrscr;

for i:=1 to 5 do 

  begin

write('A[',i,']='); readln(a[i]);

end;

max:=a[1];

for i:=1 to 5 do 

  if max<a[i] then max:=a[i];

writeln(max);

readln;

end.

Câu 2: 

uses crt;

var a:array[1..6]of integer;

min,i:integer;

begin

clrscr;

for i:=1 to 6 do 

  begin

write('A[',i,']='); readln(a[i]);

end;

min:=a[1];

for i:=1 to 6 do 

  if min>a[i] then min:=a[i];

writeln(min);

readln;

end.

uses crt;

var n,i,chan,tonchan:integer;

a:array[1..100] of integer;

begin

write('nhap n '); readln(n);

for i:=1 to n do

begin

write('a[i]='); readln(a[i]);

end;

writeln("in cac phan tu trong mang");

for i:=1 to n do

begin

writeln(a[i]);

end;

writeln("in cac phan tu chan");

chan:=0;

for i:=1 to n do

if n mod 2=0 then begin writeln(a[i]); chan:=chan+1; end;

write('tong cac phan tu chan ',chan);

readln;

end.