Submission #1176727

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#ifdef _DEBUG
#include "dump.hpp"
#else
#define dump(...)
#endif

//#define int long long
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
#define all(c) begin(c),end(c)
const int INF = sizeof(int) == sizeof(long long) ? 0x3f3f3f3f3f3f3f3fLL : 0x3f3f3f3f;
const int MOD = (int)(1e9) + 7;
template<class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; }
template<class T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; }

signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed << setprecision(10);
	double N, A, B; cin >> N >> A >> B;
	vector<double> S(N); rep(i, 0, N) { cin >> S[i]; }
	double maxi = *max_element(all(S)), mini = *min_element(all(S));
	if (maxi == mini) {
		cout << -1 << endl;
		return 0;
	}
	double P = B / (maxi - mini);
	double sum = P*accumulate(all(S), 0.0);
	double Q = A - (sum / N);
	cout << P << " " << Q << endl;
	return 0;
}

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