#include <bits/stdc++.h>   using namespace std;   bool isNonDegenerateTriangle(int a, int b, int c) {     return (a + b > c && b + c > a && c + a > b);   }   bool isDegenerateTriangle(int a, int b, int c) {     return (a + b == c || b + c == a || c + a == b);   }   int main() {     int n;     cin >> n;     long long int a[n], s = 0;     for (int i = 0; i < n; i++) {       cin >> a[i];       s += a[i];     }     sort(a, a + n);     cout << 2 * a[n - 1] - s + 1;   }   