if __name__ == '__main__':
n = int(input())
x = input().split()
li = [int(i) for i in x]
m = max(li)
k = 0
for i in li:
k += m-i
print(k)#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin >> t;
vector<int>inp(t);
for(int i = 0;i < t; i++)
{
cin >> inp[i];
}
sort(inp.begin(), inp.end());
int lar = inp[t-1];
int ans = 0;
for(int i = 0;i < t; i++)
{
ans += (lar-inp[i]);
}
cout<<ans<<endl;
return 0;
}63A - Sinking Ship | 1704B - Luke is a Foodie |
298B - Sail | 239A - Two Bags of Potatoes |
1704E - Count Seconds | 682A - Alyona and Numbers |
44A - Indian Summer | 1133C - Balanced Team |
1704A - Two 0-1 Sequences | 1467A - Wizard of Orz |
1714E - Add Modulo 10 | 1714A - Everyone Loves to Sleep |
764A - Taymyr is calling you | 1714B - Remove Prefix |
1264F - Beautiful Fibonacci Problem | 52A - 123-sequence |
1543A - Exciting Bets | 1714D - Color with Occurrences |
215B - Olympic Medal | 1445A - Array Rearrangment |
1351A - A+B (Trial Problem) | 935B - Fafa and the Gates |
1291A - Even But Not Even | 1269A - Equation |
441A - Valera and Antique Items | 1702C - Train and Queries |
816B - Karen and Coffee | 838D - Airplane Arrangements |
148B - Escape | 847G - University Classes |