delete pics to save space

8.1045.cpp

@@ -0,0 +1,22 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+typedef long long LL;
+const int maxn=1000005;
+int n; LL a[maxn],s[maxn],tot;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&n);
+	for(int i=0;i<n;i++) { scanf("%lld",&a[i]); tot+=a[i]; }
+	tot/=n;
+	for(int i=0;i<n;i++) a[i]-=tot;
+	s[0]=a[0]; for(int i=1;i<n;i++) s[i]=s[i-1]+a[i];
+	sort(s,s+n);
+	LL t=s[n/2],res=0;
+	for(int i=0;i<n;i++) res+=abs(s[i]-t);
+	printf("%lld\n",res);
+	return 0;
+}