The Number of Weak Characters in the Game
You are playing a game that contains multiple characters, and each of the characters has two main properties: attack and defense. You are given a 2D integer array properties where properties[i] = [attacki, defensei] represents the properties of the i^th character in the game.
A character is said to be weak if any other character has both attack and defense levels strictly greater than this character's attack and defense levels. More formally, a character i is said to be weak if there exists another character j where attackj > attacki and defensej > defensei.
Return the number of weak characters.
Example 1
Input
properties = [[5,5],[6,3],[3,6]]Output
0No character has strictly greater attack and defense than the other.
Example 2
Input
properties = [[2,2],[3,3]]Output
1The first character is weak because the second character has a strictly greater attack and defense.
Constraints
- 2 <= properties.length <= 10^5
- properties[i].length == 2
- 1 <= attacki, defensei <= 10^5
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