diff options
Diffstat (limited to 'content/string/longestCommonSubsequence.cpp')
| -rw-r--r-- | content/string/longestCommonSubsequence.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/content/string/longestCommonSubsequence.cpp b/content/string/longestCommonSubsequence.cpp new file mode 100644 index 0000000..6c9ea44 --- /dev/null +++ b/content/string/longestCommonSubsequence.cpp @@ -0,0 +1,15 @@ +string lcss(const string& a, const string& b) { + vector<vector<int>> m(sz(a) + 1, vector<int>(sz(b) + 1)); + for (int i = sz(a) - 1; i >= 0; i--) { + for (int j = sz(b) - 1; j >= 0; j--) { + if (a[i] == b[j]) m[i][j] = 1 + m[i+1][j+1]; + else m[i][j] = max(m[i+1][j], m[i][j+1]); + }} // Für die Länge: return m[0][0]; + string res; + for (int j = 0, i = 0; j < sz(b) && i < sz(a);) { + if (a[i] == b[j]) res += a[i++], j++; + else if (m[i][j+1] > m[i+1][j]) j++; + else i++; + } + return res; +} |