#include <bits/stdc++.h>
double n, m;
using namespace std;
int main() {
    cin >> n >> m;
    n = round(n);
    m = round(m);
    cout << m-n; /*dem so luong so nguyen*/
    return 0;
}

$#khanhtaon$

$#doanthevu$

Code C++:

#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll gg(double a, double b) 
{
    return static_cast<ll>(b) - static_cast<ll>(a) + 1;
}
int main() 
{
    double a, b;
    cin >> a >> b;
    cout << gg(a, b) << endl;
    return 0;
}