def read_int_1d():
"""
Read from sys.stdin and return an array of integers. An integer at the beginning of sys.stdin defines the array's
length.
"""
count = stdio.read_int()
a = create_1d(count, None)
for i in range(count):
a[i] = stdio.read_int()
return a
def read_int_2d():
"""
Read from sys.stdin and return a two-dimensional array of integers. Two integers at the beginning of sys.stdin
define the array's dimensions.
"""
row_count = stdio.read_int()
column_count = stdio.read_int()
a = create_2d(row_count, column_count, 0)
for row in range(row_count):
for col in range(column_count):
a[row][col] = stdio.read_int()
return a