MathDB
Problems
Contests
National and Regional Contests
India Contests
India IOQM
2022 IOQM India
7
7
Part of
2022 IOQM India
Problems
(1)
IOQM 2022 P7
Source:
3/8/2022
Find the number of maps
f
:
{
1
,
2
,
3
}
→
{
1
,
2
,
3
,
4
,
5
}
f: \{1,2,3\} \rightarrow \{1,2,3,4,5\}
f
:
{
1
,
2
,
3
}
→
{
1
,
2
,
3
,
4
,
5
}
such that
f
(
i
)
≤
f
(
j
)
f(i) \le f(j)
f
(
i
)
≤
f
(
j
)
whenever
i
<
j
i < j
i
<
j
.
IOQM