Submission #1310271

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Source Code Expand

#include <iostream>
#include <algorithm>

#define REP(i,a,b) for(int i=int(a);i<int(b);i++)

using namespace std;

typedef long long int lli;

int main () {
    lli A, B, N;
    cin >> N >> A >> B;
    cout << max(0LL, (N - 1) * B + A - (N - 1) * A - B + 1) << endl;
    return 0;
}

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