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- #include<iostream>
- long long A[10];
- int main()
- {
- int n;
- std::cin >> n;
- for (int i = 0; i < n; ++i)
- std::cin >> A[i];
- long long sum = 0;
- long long sumpairs = 0;
- for (int i = 0; i < n; ++i)
- {
- sumpairs = sumpairs + i * A[i] - sum;
- sum += A[i];
- }
- long long ans = sum + 2 * sumpairs;
- std::cout << ans << " " << n;
- return 0;
- }
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