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Diffstat (limited to 'string/levenshtein.cpp')
| -rw-r--r-- | string/levenshtein.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/string/levenshtein.cpp b/string/levenshtein.cpp new file mode 100644 index 0000000..d1980f8 --- /dev/null +++ b/string/levenshtein.cpp @@ -0,0 +1,12 @@ +int levenshtein(string& s1, string& s2) { + int len1 = s1.size(), len2 = s2.size(); + vector<int> col(len2 + 1), prevCol(len2 + 1); + for (int i = 0; i < len2 + 1; i++) prevCol[i] = i; + for (int i = 0; i < len1; i++) { + col[0] = i + 1; + for (int j = 0; j < len2; j++) + col[j+1] = min(min(prevCol[j+1] + 1, col[j] + 1), prevCol[j] + (s1[i]==s2[j] ? 0 : 1)); + col.swap(prevCol); + } + return prevCol[len2]; +}
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