uses crt;

var a:array[1..250]of integer;

i,n,t,dem:integer;

begin

clrscr;

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

for i:=1 to n do

begin

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

end;

{------------------------------xu-ly---------------------------}

dem:=0;

t:=0;

for i:=1 to n do

if a[i] mod 3=0 then

begin

inc(dem);

t:=t+a[i];

end;

writeln('so phan tu la boi cua 3 trong day nay la: ',dem);

writeln('tong cua cac phan tu la boi cua 3 trong day nay la: ',t);

readln;

end. 

uses crt;

var n,i,min:integer;

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

begin

clrscr;

write('nhap so phan tu cua day:');readln(n);

for i:=1 to n do

begin

write('nhap a[',i,']:');readln(a[i]);

end;

min:=a[1];

for i:=1 to n do

if a[i]<min then min:=a[i];

write('gia tri nho nhat cua day so la:',min);

readln;

end.