LarisaPythonOS

import random
############################# Введём количество строк и столбцов
rows=int(input('Num of rows: '))
cols=int(input('Num of cols: '))
############################# Сгенерируем массив заданного размера
r=random.randint(1,100)
mas = []
for i in range(rows):
    mas.append([])
    for j in range(cols):
        mas[i].append(r)
        r = random.randint(1,100)
############################# Выведем сгенерированный массив
for i in range(rows):
    print(mas[i], "\n")
############################# Вводим координаты элемента. Номер строки.
m_row=int(input("Enter the number of a row, which will be used in max search:"))
while (m_row>rows or m_row==rows or m_row<0):
     m_row=int(input("Bad Condition. Entered number shouldn't be equals/bigger/smaller than source number of rows: "))
############################# Номер столбца
m_col=int(input("Enter the number of a col, which will be used in max search:"))
while (m_col>cols or m_col==cols or m_col<0):
     m_col=int(input("Bad Condition. Entered number shouldn't be equals/bigger/smaller than source number of cols: "))
############################# Debug info
print(m_row,m_col, " = ", mas[m_row-1][m_col-1])
############################# Теперь найдём максимум
max=0
mm_row=m_row-1
for i in range(0,mm_row,1):
    for j in range(m_col,cols,1):
        if mas[i][j]>max:
            max=mas[i][j]
############################# Выведем искомый результат
print(max)