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leetcode-algorithms/src/UniquePaths.java at master · anishLearnsToCode/leetcode-algorithms · GitHub
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UniquePaths.java
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UniquePaths.java
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// https://leetcode.com/problems/unique-paths
// T: O(min(m, n))
// S: O(1)
public
class
UniquePaths
{
public
int
uniquePaths
(
int
m
,
int
n
) {
final
int
M
=
Math
.
max
(
m
,
n
) -
1
,
N
=
Math
.
min
(
m
,
n
) -
1
;
long
result
=
1
;
for
(
int
i
=
M
+
1
,
j
=
1
;
i
<=
M
+
N
;
i
++,
j
++) {
result
*=
i
;
result
/=
j
;
}
return
(
int
)
result
;
}
}
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