货物搬运

 1 #include <bits/stdc++.h>
 2 #define FOP freopen("in.txt","r",stdin)
 3 using namespace std;
 4  
 5 typedef long long ll;
 6 ll n,a[100005],b[100005],sum,ave;
 7 int main()
 8 {
 9     cin>>n;
10     for(int i=0;i<n;i++)
11     {
12         cin>>a[i];
13         a[i+n]=a[i];
14         sum+=a[i];
15     }
16     ave=sum/n;
17     ll minn=0x3f3f3f3f,tmp,ttmp;
18     for(int i=0;i<n;i++)
19     {
20         ttmp=0;
21         for(int j=i;j<i+n;j++)  b[j-i]=a[j];
22         for(int k=0;k<n;k++)
23         {
24             if(b[k]!=ave)
25             {
26                 tmp=b[k]-ave;
27                 b[k+1]+=tmp;
28                 b[k]=ave;
29                 ttmp+=abs(tmp);
30             }
31         }
32         minn=min(ttmp,minn);
33     }
34     cout<<minn<<endl;
35     return 0;
36 }