std::ios::sync_with_stdio(false);

int n;

std::cin >> n;

// store cumulative sum instead of numbers

std::vector<int> intensity_cum_sum(static_cast<size_t>(n));

for(int i = 0; i < n; i++) {

std::cin >> intensity_cum_sum[i];

if (i > 0)

intensity_cum_sum[i] += intensity_cum_sum[i-1];

}

int num_queries;

std::cin >> num_queries;

int i, j;

for(int _ = 0; _ < num_queries; _++) {

std::cin >> i >> j;

// 1 <= j <= i <= n, so use j - 1, i - 1

if (i > 1)

std::cout << intensity_cum_sum[j - 1] - intensity_cum_sum[i - 1 - 1] << "\n";

else

std::cout << intensity_cum_sum[j - 1] << "\n";

}

return 0;