#include <algorithm> #include <cstdio> #include <iostream> using namespace std; int a[55]; int main() { freopen("group.in", "r", stdin); freopen("group.out", "w", stdout); int n, sum = 0; cin >> n; for (int i = 0; i < n; i++) { cin >> a[i]; sum += a[i]; } int L, R; cin >> L >> R; if (sum / n >= L && sum / n <= R) { int ans1 = 0, ans2 = 0; for (int i = 0; i < n; i++) { if(a[i] > R){ ans1 += a[i]-R; } if(a[i] < L){ ans2 += L-a[i]; } // 这里需要添加合适的代码 } cout <<max(ans1,ans2)<< endl; } else { cout << -1 << endl; } return 0; }