# Python: List of integers where the sum of the first i integers is i

## Python Programming Puzzles: Exercise-7 with Solution

Write a Python program to check a given list of integers where the sum of the first i integers is i.

Input: [0, 1, 2, 3, 4, 5] Output: False Input: [1, 1, 1, 1, 1, 1] Output: True Input: [2, 2, 2, 2, 2] Output: False

**Sample Solution:**

**Python Code:**

```
# Define a function named 'test' that takes a list 'li' and an integer 'i' as input
def test(li, i):
# Check if the sum of the first 'i' integers in 'li' equals 'i'
return sum(li[:i]) == i
# Create a list 'nums' with specific elements
nums = [0, 1, 2, 3, 4, 5]
# Assign an integer 'i' to the variable
i = 1
# Print the original list
print("Original list:")
print(nums)
# Print a message indicating the current value of 'i'
print("Check the said list, where the sum of the first i integers is i: i =", i)
# Print the result of the test function applied to the 'nums' list with the current value of 'i'
print(test(nums, 1))
# Update the value of 'i'
i = 3
# Print a message indicating the updated value of 'i'
print("\nOriginal list:")
print(nums)
# Print the result of the test function applied to the 'nums' list with the updated value of 'i'
print("Check the said list, where the sum of the first i integers is i: i =", i)
print(test(nums, 3))
# Update the value of 'i' and 'nums'
i = 6
nums = [1, 1, 1, 1, 1, 1]
# Print a message indicating the updated value of 'i'
print("\nOriginal list:")
print(nums)
# Print the result of the test function applied to the updated 'nums' list with the updated value of 'i'
print("Check the said list, where the sum of the first i integers is i: i =", i)
print(test(nums, 6))
# Update the value of 'i' and 'nums'
i = 2
nums = [2, 2, 2, 2, 2]
# Print a message indicating the updated value of 'i'
print("\nOriginal list:")
print(nums)
# Print the result of the test function applied to the updated 'nums' list with the updated value of 'i'
print("Check the said list, where the sum of the first i integers is i: i =", i)
print(test(nums, 2))
```

Sample Output:

Original list: [0, 1, 2, 3, 4, 5] Check the said list, where the sum of the first i integers is i: i = 1 False Original list: [0, 1, 2, 3, 4, 5] Check the said list, where the sum of the first i integers is i: i = 3 True Original list: [1, 1, 1, 1, 1, 1] Check the said list, where the sum of the first i integers is i: i = 6 True Original list: [2, 2, 2, 2, 2] Check the said list, where the sum of the first i integers is i: i = 2 False

**Flowchart:**

**Python Code Editor :**

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