Submission #3570490

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Source Code Expand

// Ala be zekrellah tatmaenolgholoob ...
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define F first
#define S second
#define MP make_pair
const int maxn = 1e5+9;
const ll mod = 1e9+7;

int main () {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	ll a, b, c, k;
	cin >> a >> b >> c >> k;
	if (k % 2)
		cout << b - a << "\n";
	else
		cout << a - b << "\n";
}

Submission Info

Judge Result