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Find The Index of The First Occurrence in a String
EasyArraysGiven two strings haystack and needle, return the index of the first occurrence of needle in haystack, or -1 if it is not present.
Input format (stdin): the first line is haystack, the second line is needle. Output the index or -1.
Examples
Input: sadbutsad
sad
Output: 0
needle 'sad' first appears at index 0.
Input: leetcode
leeto
Output: -1
'leeto' never appears.
Constraints
- 1 <= |haystack|, |needle| <= 10^4
- Lowercase English letters
Sheets
NeetCode 250
find-the-index-of-the-first-occurrence-in-a-string.cpp3 sample tests
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Test results
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Custom input (stdin)
Output
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