Practice_001
F2
#include <bits/stdc++.h>
using namespace std;
int main()
{
//F2: S = -1 + 2 - 3 + 4 + ... + (-1)^n*n
int n;
cin>>n;
if(n >= 0)
{
int s = 0,tich;
for(int i = 0 ; i <= n ; i++)
{
tich = pow(-1,i)*i;
s = s + tich;
}
cout<<"S = "<<s;
}
}
F3
#include <bits/stdc++.h>
using namespace std;
int main()
{
/*
500 MB dau vs gia 1 MB 50 USD
400 MB sau vs gia 1 MB 40 USD
cac MB tiep theo voi gia 1 MB 30 USD
*/
int mb;
cout<<"Input MB: ";
cin>>mb;
if(mb <= 500)
cout<<"Cost: "<<50*mb<<" USD";
else if(mb > 500 && mb <= 900)
cout<<"Cost: "<<50*500 + 40*(mb - 500)<<" USD";
else if(mb > 900)
cout<<"Cost: "<<50*500 + 40*400 +30*(mb - 900)<<" USD";
}
F4
#include <bits/stdc++.h>
using namespace std;
int main()
{
// nhap vao 1 so tu nhien 1 <= n <= 30000 tinh tong cac chu so le
int n;
cin>>n;
if(n >= 1 && n <= 30000)
{
int sum = 0;
// a la so du
while(n != 0)
{
int a = n % 10;
if(a % 2 != 0)
sum = sum + a;
n = n / 10;
}
cout<<sum<<endl;
}
return 0 ;
}
F5
#include <bits/stdc++.h>
using namespace std;
int main()
{
//nhap 1 so bat ky in ra hang don vi va hang chuc
int n,a;cin>>n;
for(int i = 0 ; i < 2; i++)
{
a = n % 10;
if(i == 0)
cout<<"Hang don vi:"<<a<<endl;
if(i == 1)
cout<<"Hang chuc:"<<a<<endl;
n = n / 10;
}
}
F6
#include <bits/stdc++.h>
using namespace std;
bool chinhphuong(int n)
{
int k = sqrt(n);
if(k*k == n)
return true;
return false;
}
int main()
{
int n;
cin>>n;
int num[n];
int count = 0;
for(int i = 0 ; i < n ; i++)
{
cin>>num[i];
count++;
}
cout<<count<<endl;
for(int i = 0 ; i < n ;i++)
{
if(chinhphuong(num[i]) == 1)
cout<<num[i]<<" ";
}
}
