Submission #1070112

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<string>
#include<cstring>
#include<vector>
#include<map>
#include<list>
#include<stack>
#include<queue>
#include<climits> //INT_MIN/MAX
using namespace std;

#define FOR(i,s,e) for(ll (i)=(s);(i)<(e);(i)++)
#define FORR(i,s,e) for(ll (i)=(s);(i)>(e);(i)--)
#define MOD 1000000007
#define llong long long
#define debug(x) cout<<#x<<": "<<x<<endl
typedef long long ll;
llong N;

/* 2017/01/18 問題 -----  Name/Link ----- */
/* -----解説等-----
問題:


*/

ll ans = 0;
ll x[100001];

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

    ll A, B;
    cin >> N >> A >> B;
    FOR(i, 1, N + 1)
        cin >> x[i];
    FOR(i, 1, N ) {
        ans += min(A*(x[i + 1] - x[i]), B);
    }
    cout << ans << endl;

    return 0;
}

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