Matritsa
Matritsa-14
Matritsa-15
Matritsa-16
~/algor $ cat masalalar/matritsa-bosh-diagonal-yigindisi
Matritsa-15
Bosh diagonal yig'indisi
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
128 MB
27%
O'lchamlari $n \times n$ bo'lgan kvadrat matritsa berilgan. Matritsaning bosh diagonali elementlari yig'indisini hisoblang:
$$S = \sum_{i=1}^{n} a_{i,i}$$
Kiruvchi ma'lumotlar
Birinchi qatorda ikkita bir xil natural son: $n$ va $n$. Keyingi $n$ ta qatorda $n$ tadan butun son.
Chiquvchi ma'lumotlar
Bitta butun son — bosh diagonal elementlari yig'indisi.
Izoh
$1 \le n \le 200$
$-1000 \le a_{i,j} \le 1000$
Misollar
Kirish #1
3 3 1 2 3 4 5 6 7 8 9
Chiqish #1
15
Kirish #2
1 1 -4
Chiqish #2
-4