MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA - College-Hosted Events
CHMMC problems
2015 CHMMC (Fall)
9
9
Part of
2015 CHMMC (Fall)
Problems
(1)
2015 Fall Team #9
Source:
3/26/2022
Let
T
T
T
be a
2015
×
2015
2015 \times 2015
2015
×
2015
array containing the integers
1
,
2
,
3
,
.
.
.
,
201
5
2
1, 2, 3, ... , 2015^2
1
,
2
,
3
,
...
,
201
5
2
satisfying the property that
T
i
,
a
>
T
i
,
b
T_{i,a }> T_{i,b}
T
i
,
a
>
T
i
,
b
for all
a
>
b
a > b
a
>
b
and
T
c
,
j
>
T
d
,
j
T_{c,j} > T_{d,j}
T
c
,
j
>
T
d
,
j
for all
c
>
d
c > d
c
>
d
where
1
≤
a
,
b
,
c
,
d
≤
2015
1 \le a, b, c, d \le 2015
1
≤
a
,
b
,
c
,
d
≤
2015
and
T
i
,
j
T_{i,j}
T
i
,
j
represents the entry in the
i
i
i
-th row and
j
j
j
-th column of
T
T
T
. How many possible values are there for the entry at
T
5
,
5
T_{5,5}
T
5
,
5
?
combinatorics