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 ith 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.
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Example 1:
\n\n\nInput: properties = [[5,5],[6,3],[3,6]]\nOutput: 0\nExplanation: No character has strictly greater attack and defense than the other.\n\n\n
Example 2:
\n\n\nInput: properties = [[2,2],[3,3]]\nOutput: 1\nExplanation: The first character is weak because the second character has a strictly greater attack and defense.\n\n\n
Example 3:
\n\n\nInput: properties = [[1,5],[10,4],[4,3]]\nOutput: 1\nExplanation: The third character is weak because the second character has a strictly greater attack and defense.\n\n\n
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Constraints:
\n\n2 <= properties.length <= 105properties[i].length == 21 <= attacki, defensei <= 105Compiled with clang 11 using the latest C++ 20 standard.
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Most standard library headers are already included automatically for your convenience.
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