Create delete-columns-to-make-sorted-iii.cpp

Author: kamyu104

C++/delete-columns-to-make-sorted-iii.cpp

@@ -0,0 +1,23 @@
+// Time:  O(n * l^2)
+// Space: O(l)
+
+class Solution {
+public:
+    int minDeletionSize(vector<string>& A) {
+        vector<int> dp(A[0].length(), 1);
+        for (int j = 0; j < A[0].length(); ++j) {
+            for (int i = 0; i < j; ++i) {
+                int k = 0;
+                for (; k < A.size(); ++k) {
+                    if (A[k][i] > A[k][j]) {
+                        break;  
+                    }
+                }
+                if (k == A.size()) {
+                    dp[j] = max(dp[j], dp[i] + 1);
+                }
+            }
+        }
+        return A[0].length() - *max_element(dp.begin(), dp.end());
+    }
+};