#include <bits/stdc++.h>

using namespace std;

long long n,i,t;

int main()

{

cin>>n;

t=1;

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

cout<<t;

return 0;

}

tham khảo

TK

Var i ,n : integer;

S , T : real;

Begin

write ('n=') ; read (n) ;

S:= 0;

T:= 1;

For i:= 1 to n do

S:= S + i;

T:= T * i;

Writeln (' Tong cua ' ,n,' so dau tien la' , S );

Writeln (' Tich của ' ,n,' so dau tien la' , T );

Readln;

End.

#include <bits/stdc++.h>

using namespace std;

long long n,i,s=1;

int main()

{

cin>>n;

for (int i=1; i<=n; i++) 

s=s*i;

cout<<s;

}

uses crt;

var i,n:integer;

s:real;

begin

clrscr;

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

s:=1;

i:=1;

while i<=n do 

  begin

s:=s*i;

i:=i+1;

end;

writeln(s:0:0);

readln;

end.

Var i,n:integer;

p:longint;

Begin

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

p:=0;

For i:=2 to n do p:=p*i;

Write('Tich la ',p);

Readln;

End.

Var i,n:integer;

p:longint;

Begin

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

p:=1;

For i:=2 to n do p:=p*i;

Write('Tich la ',p);

Readln;

End.

tham khảo

Var i ,n : integer;

S , T : real;

Begin

write ('n=') ; read (n) ;

S:= 0;

T:= 1;

For i:= 1 to n do

S:= S + i;

T:= T * i;

Writeln (' Tong cua ' ,n,' so dau tien la' , S );

Writeln (' Tich của ' ,n,' so dau tien la' , T );

Readln;

End.

#include <bits/stdc++.h>

using namespace std;

long long i,n,t;

int main()

{

cin>>n;

t=0;

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

cout<<t;

return 0;

}

var n,i,s:longint; begin write('nhap so n=');readln(n); s:=0; for i:=1 to n do s:=s+i; writeln(' tong n so nguyen la:',s); readln; end.

Câu 1: 

#include <bits/stdc++.h>

using namespace std;

long long n,i,s;

int main()

{

cin>>n;

s=0;

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

cout<<s;

return 0;

}

uses crt;

var n,i,dem:integer;

begin

clrscr;

readln(n);

dem:=0;

for i:=1 to n do

if i mod 2=0 then inc(dem);

writeln(dem);

readln;

end.