import sys input_data = sys.stdin.read().split('\n') num_trees = int(input_data[0]) tree_masses = tuple(map(int, input_data[1:num_trees+1])) num_queries = int(input_data[num_trees+1]) queries = tuple(map(lambda x: tuple(map(int, x.split(" "))), input_data[num_trees+2:])) # print(f"trees: {tree_masses} ({num_trees})") # print(f"queries: {num_queries} ({num_queries})") psa = [0] for i in range(1, num_trees+1): psa.append(psa[i-1] + tree_masses[i-1]) # print(psa) for (start, end) in queries: # print(start, end) print(psa[end+1] - psa[start])