Codeforces758A Holiday Of Equality 2017-01-20 10:08 48人阅读 评论(0) 收藏

A. Holiday Of Equality

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

In Berland it is the holiday of equality. In honor of the holiday the king decided to equalize the welfare of all citizens in Berland by the expense of the state treasury.

Totally in Berland there are n citizens, the welfare of each of them is estimated as the integer in ai burles
(burle is the currency in Berland).

You are the royal treasurer, which needs to count the minimum charges of the kingdom on the king's present. The king can only give money, he hasn't a power to take away them.

Input

The first line contains the integer n (1 ≤ n ≤ 100) —
the number of citizens in the kingdom.

The second line contains n integers a1, a2, ..., an,
where ai (0 ≤ ai ≤ 106) —
the welfare of the i-th citizen.

Output

In the only line print the integer S — the minimum number of burles which are had to spend.

Examples

input

5
0 1 2 3 4

output

10

input

5
1 1 0 1 1

output

1

input

3
1 3 1

output

4

input

1
12

output

0

Note

In the first example if we add to the first citizen 4 burles, to the second 3,
to the third 2 and to the fourth 1,
then the welfare of all citizens will equal 4.

In the second example it is enough to give one burle to the third citizen.

In the third example it is necessary to give two burles to the first and the third citizens to make the welfare of citizens equal 3.

In the fourth example it is possible to give nothing to everyone because all citizens have 12 burles.

——————————————————————————————————————

题目的意思是给出n个数，要使每个数加上一定的数是得每个都相等，问一共至少加多少？

找出最大值，计算每个数与他的差值求和即可

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <string>

using namespace std;

int a[100005];
int main()
{
    int n;
while(~scanf("%d",&n))
      {
          int mx=-1;
          for(int i=0;i<n;i++)
            {
                scanf("%d",&a[i]);
                if(a[i]>mx)
                    mx=a[i];
            }
            int sum=0;
            for(int i=0;i<n;i++)
            {
                sum+=(mx-a[i]);
            }
            printf("%d\n",sum);
      }
    return 0;
}