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Write a program that computes the sum of the first N natural numbers (1 + 2 + 3 + ... + N).
A single integer N on a line.
A single integer representing the sum of the first N natural numbers.
1 <= N <= 1000
5
15
The sum of the first 5 natural numbers (1+2+3+4+5) is 15.
10
55
The sum of the first 10 natural numbers (1+2+...+10) is 55.
More in: Recursion problems
# Read the input from stdin and print the answer. import sys def main(): data = sys.stdin.read().split() # your code here main()
