diff --git a/solution/0041.First Missing Positive/Solution.c b/solution/0041.First Missing Positive/Solution.c
new file mode 100644
index 0000000000000..6e859a40cb28e
--- /dev/null
+++ b/solution/0041.First Missing Positive/Solution.c	
@@ -0,0 +1,22 @@
+int firstMissingPositive(int* nums, int numsSize) {
+    
+    int Max = nums[0], i, *Count;
+    
+    for(i = 1; i<numsSize; i++){
+        Max = (Max < nums[i]) ? nums[i] : Max;
+    }
+    
+    Count = (int*)calloc(Max+1, sizeof(int));
+    for(i = 0; i<numsSize; i++){
+        if(nums[i] > 0){
+            Count[nums[i]]++;
+        }
+    }
+    
+    i = 1;
+    while(Count[i] != 0){
+        i++;
+    }
+    
+    return i;
+}
diff --git a/solution/0066.Plus One/Solution.py b/solution/0066.Plus One/Solution.py
new file mode 100644
index 0000000000000..9af96eca520b8
--- /dev/null
+++ b/solution/0066.Plus One/Solution.py	
@@ -0,0 +1,20 @@
+class Solution:
+    def plusOne(self, digits):
+        """
+        :type digits: List[int]
+        :rtype: List[int]
+        """
+        
+        i = len(digits)-1
+        digits[i] += 1
+        
+        while i > 0 and digits[i] > 9 :
+            digits[i] = 0
+            i -= 1
+            digits[i] += 1
+        
+        if digits[0] > 9:
+            digits[0] = 0
+            digits.insert(0, 1)
+        
+        return digits
diff --git a/solution/0066.Plus One/Solution2.py b/solution/0066.Plus One/Solution2.py
new file mode 100644
index 0000000000000..765de08c522b6
--- /dev/null
+++ b/solution/0066.Plus One/Solution2.py	
@@ -0,0 +1,8 @@
+class Solution:
+    def plusOne(self, digits):
+        """
+        :type digits: List[int]
+        :rtype: List[int]
+        """
+        
+        return list(map(int, str(int("".join(map(str, digits)))+1)))