Submission #11414441

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Source Code Expand

import java.util.Scanner;

final class Solver {
	static final Solver INSTANCE = new Solver();

	void solve(Scanner sc) {
		int N = sc.nextInt();
		int A = sc.nextInt();
		int B = sc.nextInt();
		if (A > B) {
			System.out.println(0);
			return;
		}
		if (N == 1) {
			System.out.println(A == B ? 1 : 0);
			return;
		}
		long min = Math.addExact(Math.multiplyExact(A, N - 1L), B);
		long max = Math.addExact(Math.multiplyExact(B, N - 1L), A);
		System.out.println(max - min + 1);
	}
}

class Main {
	public static void main(String... args) {
		Scanner in = new Scanner(System.in);

		Solver.INSTANCE.solve(in);

		in.close();
	}
}

Submission Info

Judge Result