总和与部分和

def calculate_sums(arr):
    total_sum = sum(arr)
    partial_sums = []
    current_sum = 0
    for num in arr:
        current_sum += num
        partial_sums.append(current_sum)
    return total_sum, partial_sums

# 示例数组
arr = [1, 2, 3, 4]
total_sum, partial_sums = calculate_sums(arr)

print("总和:", total_sum)
print("部分和:", partial_sums)

from decimal import Decimal

def calculate_sums_large(arr):
    total_sum = Decimal(0)
    partial_sums = []
    current_sum = Decimal(0)
    for num in arr:
        current_sum += Decimal(num)
        partial_sums.append(current_sum)
    return total_sum, partial_sums

# 示例数组
arr = [10**10, 10**10, 10**10]
total_sum, partial_sums = calculate_sums_large(arr)

print("总和:", total_sum)
print("部分和:", partial_sums)