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LeetCode-Solutions/TypeScript/two-sum.ts at master · code-cse/LeetCode-Solutions · GitHub
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two-sum.ts
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LeetCode-Solutions
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two-sum.ts
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// Time: O(n)
// Space: O(n)
function
twoSum
(
nums
:
number
[
]
,
target
:
number
)
:
number
[
]
{
let
lookup
=
new
Map
(
)
;
for
(
let
i
=
0
;
i
<
nums
.
length
;
i
++
)
{
if
(
lookup
.
has
(
target
-
nums
[
i
]
)
)
{
return
[
lookup
.
get
(
target
-
nums
[
i
]
)
,
i
]
;
}
lookup
.
set
(
nums
[
i
]
,
i
)
;
}
return
[
]
;
}
;
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