Initial commit

Easy/implement-strstr/solution.cpp

@@ -0,0 +1,25 @@
+#include <string>
+
+class Solution {
+public:
+    int strStr(std::string haystack, std::string needle) {
+        for (int i = 0; i < haystack.size(); ++i) {
+            if (haystack.at(i) == needle.at(0)) {
+                bool found = false;
+                for (int j = 0; i + j < haystack.size() && j < needle.size(); ++j) {
+                    if (haystack.at(i + j) != needle.at(j)) {
+                        break;
+                    } else if (j == needle.size() - 1) {
+                        found = true;
+                    }
+                }
+
+                if (found) {
+                    return i;
+                }
+            }
+        }
+
+        return -1;
+    }
+};