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uses crt;
var a:array[1..100]of integer;
i,n:integer;
begin
clrscr;
randomize;
write('Nhap n='); readln(n);
for i:=1 to n do
a[i]:=random(100);
for i:=1 to n do
write(a[i]:4);
readln;
end.
Câu 7:
const fi='dayso.inp';
fo='dayso.out';
var f1,f2:text;
a,b:array[1..100]of integer;
i,n,dem,j,t,kt,dem1:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,n);
for i:=1 to n do
read(f1,a[i]);
t:=0;
for i:=1 to n do
t:=t+a[i];
writeln(f2,'Tong cua day so la: ',t);
b[1]:=a[1];
dem:=1;
for i:=1 to n do
begin
kt:=0;
for j:=1 to dem do
if a[i]=b[j] then kt:=1;
if kt=0 then
begin
inc(dem);
b[dem]:=a[i];
end;
end;
for i:=1 to dem do
begin
dem1:=0;
for j:=1 to n do
if b[i]=a[j] then inc(dem1);
writeln(f2,b[i],' xuat hien ',dem1,' lan');
close(f1);
close(f2);
end.
2:
#include <bits/stdc++.h>
using namespace std;
int A[100],ln,nn,vt1,vt2,n;
int main()
{
cin>>n;
for(int i=1; i<=n; i++) cin>>A[i];
ln=A[1];
for (int i=1; i<=n; i++)
ln=max(ln,A[i]);
nn=A[1];
for (int i=1; i<=n; i++)
nn=min(nn,A[i]);
vt1=1; vt2=n;
for (int i=1; i<=n; i++)
if (ln==A[i] && vt1<=i) vt1=i;
for (int i=n; i>=1; i--)
if (nn==A[i] && vt2>=i) vt2=i;
swap(A[vt1],A[vt2]);
for (int i=1; i<=n; i++)
cout<<A[i]<<" ";
}
#include <bits/stdc++.h>
using namespace std;
long long a[10000],i,n,t;
int main()
{
freopen("avg.inp","r",stdin);
freopen("avg.out","w",stdout);
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
t=0;
for (i=1; i<=n; i++) t+=a[i];
cout<<fixed<<setprecision(1)<<(t*1.0)/(n*1.0);
return 0;
}
#include <bits/stdc++.h>
using namespace std;
long long a[1000],n,i;
int main()
{
freopen("dayd.inp","r",stdin);
freopen("dayd.out","w",stdout);
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++)
if (a[i]>0) cout<<a[i]<<" ";
return 0;
}
uses crt;
var a:array[1..100]of integer;
i,n,j,kt: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 do
if a[i]>1 then
begin
kt:=0;
for j:=2 to a[i]-1 do
if a[i] mod j=0 then kt:=1;
if kt=0 then write(a[i]:4);
end;
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long a[100],i,n,x,dem;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
cin>>x;
dem=0;
for (i=1; i<=n; i++)
if (x==a[i]) dem++;
cout<<dem;
return 0;
}
var a:array [1..100] of integer;
i,n,dem:integer;
begin
write('Nhap so luong so N = ');readln(n);
for i:=1 to n do
begin
write('Nhap vao so thu ',i,': ');readln(a[i]);
if a[i] mod 3 = 0 then dem:=dem+1;
end;
write('Co ',dem,' so chia het cho 3');
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long a[1000],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]%3==0) dem++;
cout<<dem;
return 0;
}
