Submission #8347609

---

Source Code Expand

# include<bits/stdc++.h>

using namespace std;

# define int long long
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<double, int> pdi;
typedef pair<ll, ll> pll;

# define S second
# define F first
# define kill(x) return(cout << x << endl, 0)
# define debug(x) cerr<< #x << " : " << x << endl
# define ddebug(x, y) cerr<< #x << " : " << x  << ", " << #y << " : " << y << endl
# define sz(s) (int)s.size()
# define sq(x) (x) * (x)
# define PB(x) push_back(x)
# define smax(x, y) (x) = max((x), (y))
# define smin(x, y) (x) = min((x), (y))
# define all(x) x.begin(), x.end()
# define SP fixed << setprecision(10)

int32_t main()
{
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

	int n, a, b;
	cin >> n >> a >> b;

	if (a > b || (n == 1 && a != b))
		kill(0);
	cout << ((n - 1) * b + a) - ((n - 1) * a + b) + 1 << endl;

	return 0;
}

Submission Info

Judge Result