TASK

Problem

#100

Given three integers `a`, `b`, and `c`, print `YES` if `a ≤ b ≤ c`; otherwise print `NO`.

EXAMPLE

Example

Input

1 2 3

Output

YES

LIMITS

Constraints

|a|, |b|, |c| ≤ 10^9.

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LEARN Theory for this problem

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These exercises combine arithmetic, comparisons, and small branches. Keep each condition explicit and easy to verify.

Connection to “Three Numbers in Nondecreasing Order”: here, intermediate values are best kept in named variables so the formula stays readable and data types remain clear.

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NEED HELP? Hints

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['Break the task into a few simple checks instead of compressing everything into a clever expression.', 'After solving “Three Numbers in Nondecreasing Order”, verify the algorithm on your own small example and on an allowed boundary case. Print only the required result with no extra text.']

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ANSWER Solution

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#include <iostream>
using namespace std;
int main() {
    long long a,b,c;
    cin >> a >> b >> c;
    cout << (a<=b&&b<=c?"YES":"NO") << '\n';
    return 0;
}