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Diagonal elementlar yig'indisi

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📝 Vazifa tavsifi

N×N kvadrat matritsa berilgan. Asosiy diagonaldagi elementlar yig'indisini toping.

Misol:

Input: N=3, matrix=[[1,2,3],[4,5,6],[7,8,9]]
Output: 15

Diagonal elementlar yig'indisi

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📚 Misollar

Kiruvchi: N=3, matrix=[[1,2,3],[4,5,6],[7,8,9]]
Chiquvchi: 15
Kiruvchi: N=4, matrix=[[1,0,0,0],[0,2,0,0],[0,0,3,0],[0,0,0,4]]
Chiquvchi: 10
func diagonalSum(_ N: Int, _ matrix: [[Int]]) -> Int { // Kodingizni shu yerga yozing }

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