s0014

src/s0014_longest_common_prefix.cpp

@@ -0,0 +1,26 @@
+#include "s0014_longest_common_prefix.hpp"
+
+string Solution::longestCommonPrefix(vector<string>& strs) {
+  string o{""};
+  int size = strs.size();
+  int minLen = strs.at(0).length();
+  for (int i{0}; i < size; i++) {
+    if (strs.at(i).length() < minLen) {
+      minLen = strs.at(i).length();
+    }
+  }
+  // string index
+  for (int i{0}; i < minLen; i++) {
+    string tmp = strs.at(0).substr(i, 1);
+    // vector index
+    for (int j{0}; j < size; j++) {
+      if (strs.at(j).substr(i, 1) == tmp) {
+        continue;
+      } else {
+        return o;
+      }
+    }
+    o.append(tmp);
+  }
+  return o;
+}