Question

[Thuỷ Tiên]

Giúp mik câu 1 vs ạ

Answer 1

[Nguyen Hung]

Uses crt;

Var i,n,k,tong:integer;

      tb:real;

      a:array[1..1000] of integer;

      f1,f2:text;

Begin

clrscr;

Assign(f1,'SONGUYEN.inp');

Assign(f2,'SONGUYEN.out');

Reset(f1);Readln(f1,n);

For i:= 1 to n do read(f1,a[i]);

close(f1);

k:=0;tong:=0;

For i:= 1 to n do If (a[i]<0) and (Abs(a[i]) mod 2 = 1) then

  Begin

  inc(k);

  tong:=tong+a[i];

  End;

tb:=tong/n;

Rewrite(f2);

writeln(f2,tb:0:2);

Writeln(f2,k);

close(f2);

readln;

End.

Answer 2

[Nguyễn Lê Phước Thịnh]

Câu 2: 

const fi='xauhoa.inp';

fo='xauhoa.out';

var f1,f2:text;

st,s1:string;

d,i:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

readln(f1,st);

d:=length(st);

s1:='';

for i:=1 to d do 

  if st[i] in ['A'..'Z'] then s1:=s1+st[i];

writeln(f2,s1);

writeln(f2,length(s1));

close(f1);

close(f2);

end.