Submission #1309996

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cstring>
#include <sstream>
#include <map>
#include <set>
#include <cmath>
#include <queue>
#include <stack>
#include <list>
#include <numeric>
#include <bitset>
#include <ext/algorithm>
#include <ext/numeric>
#define ffor(_a,_f,_t) for(int _a=(_f),__t=(_t);_a<__t;_a++)
#define all(_v) (_v).begin() , (_v).end()
#define sz size()
#define pb push_back
#define SET(__set, val) memset(__set, val, sizeof(__set))
#define FOR(__i, __n) ffor (__i, 0, __n)
typedef long long LL; using namespace std;

int main() {
	LL N, A, B;
	cin >> N >> A >> B;
	if ((N == 1 && A != B) || A > B) {
		cout << 0 << endl;
		return 0;
	}
	LL mmin = (N - 1) * A + B, mmax = A + (N - 1) * B;
	cout << mmax - mmin + 1 << endl;
	return 0;
}

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