Submission #3982221

---

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)

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

Submission Info

Judge Result