Triangle Existence
Programming Basics · Python
TASK
Problem
Given positive sides `a`, `b`, `c`, print `YES` if a triangle can exist, else `NO`.
EXAMPLE
Example
3 4 5
YES
LIMITS
Constraints
a > 0; b > 0; c > 0
LEARN
Theory for this problem
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`input()` reads data entered by the user. The result of `input()` is initially a string. `split()` separates one input line into individual values using spaces. `map()` applies the specified conversion to each input value. The `+` operator adds numbers. Comparison operators `==`, `!=`, `<`, `>`, `<=`, `>=` compare values and produce `True` or `False`. `and` requires all combined conditions to be true. `if` checks a condition and runs its block when the condition is true. `else` runs when the corresponding `if` condition is false. `print()` displays the program result. Print only what the problem statement requires.
**Connection to this task.** An `if` statement chooses a program branch from a Boolean condition. Comparisons produce `True` or `False`, and `elif` lets you test several mutually exclusive cases in order. The expression `'YES'` shows how this idea is applied to the task data.
NEED HELP?
Hints
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['Each side must be less than the sum of the other two.']
ANSWER
Solution
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a, b, c = map(int, input().split())
if a + b > c and a + c > b and (b + c > a):
print('YES')
else:
print('NO')