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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- long long int a,sum,ans,n,i;
- while(cin>>n && n)
- {
- sum=0,ans=0;
- for(i=0;i<n;i++)
- {
- cin>>a;
- sum+=a;
- ans+=(abs(sum));
- }
- cout<<ans<<endl;
- }
- return 0;
- }
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