Drone Reachability Check

Drone Reachability Check

You are given two points A and B in a 2D plane with coordinates \( (x_1, y_1) \) and \( (x_2, y_2) \) respectively. A drone positioned at point A can only move in three ways: move right (increase \( x \)), move up (increase \( y \)), or remain stationary. It cannot move left or down.

The task is to determine if the drone can reach point B from point A using only these allowed moves. This is possible if and only if \( x_2 \ge x_1 \) and \( y_2 \ge y_1 \).

inputFormat

The input consists of four space-separated integers: ( x_1 ), ( y_1 ), ( x_2 ), and ( y_2 ), representing the coordinates of the starting point A and the target point B respectively.

outputFormat

Output a single line containing the string "Yes" if the drone can reach point B from point A under the allowed moves. Otherwise, output "No".## sample

0 0 3 3

Yes

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