diff --git "a/AejiJeon/programmers/210425sprint/\354\241\260\354\235\264\354\212\244\355\213\261.py" "b/AejiJeon/programmers/210425sprint/\354\241\260\354\235\264\354\212\244\355\213\261.py"
new file mode 100644
index 0000000..e69de29
diff --git "a/AejiJeon/programmers/210502sprint/\353\215\224\353\247\265\352\262\214.py" "b/AejiJeon/programmers/210502sprint/\353\215\224\353\247\265\352\262\214.py"
new file mode 100644
index 0000000..5b79a12
--- /dev/null
+++ "b/AejiJeon/programmers/210502sprint/\353\215\224\353\247\265\352\262\214.py"
@@ -0,0 +1,23 @@
+import heapq
+
+
+def solution(scoville, K):
+
+    count = 0
+    heapq.heapify(scoville)
+    while scoville:
+
+        min1 = heapq.heappop(scoville)
+        # 모든 음식의 스코빌 지수가 K이상인 경우
+        if min1 >= K:
+            return count
+        # 두 번째로 맵지 않은 음식이 존재하는 경우
+        if scoville:
+            min2 = heapq.heappop(scoville)
+            # 섞은 음식의 스코빌 지수를 계산하여 queue에 넣어줌
+            heapq.heappush(scoville, min1 + 2 * min2)
+            count += 1
+    return -1
+
+
+print(solution([1, 2, 3, 9, 10, 12], 7))
\ No newline at end of file
diff --git a/choieungi/main.py b/choieungi/main.py
index b210d9c..7cf5f50 100644
--- a/choieungi/main.py
+++ b/choieungi/main.py
@@ -1,42 +1,13 @@
-from datetime import datetime, timedelta
+import heapq
 
-
-# take time = count number?
-
-def count_num(start, times):
-    cnt = 0
-    d = timedelta(milliseconds=999)
-    for j in times:
-        if j[0] <= start + d and j[0] >= start:
-            cnt += 1
-        elif j[1] >= start and j[1] <= start + d:
-            cnt += 1
-        elif j[0] >= start and start + d >= j[1]:
-            cnt += 1
-        elif j[0] <= start and j[1] >= start + d:
-            cnt += 1
-    return cnt
-
-
-def solution(lines):
-    times = []
-    for i in lines:
-        temp = i.split()
-        t = temp[2][:-1]  # remove 's'
-        if len(t) == 1:
-            take_time = timedelta(seconds=(int(t))) - timedelta(milliseconds=1)  # +999
-        else:
-            a = t.split(".")
-            take_time = timedelta(seconds=int(a[0]), milliseconds=int(a[1])) - timedelta(milliseconds=1)
-        end_time = datetime.strptime(temp[0] + temp[1], '%Y-%m-%d%H:%M:%S.%f')
-        times.append((end_time - take_time, end_time))  # (start_time, end_time)
-
-    # times.sort(key = lambda x: x[0]) input이 이미 정렬됨.
+def solution(scoville, K):
     answer = 0
-    for i in times:
-        start = i[0]
-        answer = max(count_num(start, times), answer)
-        start = i[1]
-        answer = max(count_num(start, times), answer)
+    heapq.heapify(scoville)
+    while scoville[0]<K:
+        if len(scoville)>=2:
+            heapq.heappush(scoville, (heapq.heappop(scoville))+heapq.heappop(scoville)*2)
+            answer+=1
+        else:
+            return -1
 
     return answer
\ No newline at end of file
diff --git "a/choieungi/programmers/lv2/\353\215\224\353\247\265\352\262\214/\353\215\224\353\247\265\352\262\214.py" "b/choieungi/programmers/lv2/\353\215\224\353\247\265\352\262\214/\353\215\224\353\247\265\352\262\214.py"
new file mode 100644
index 0000000..7cf5f50
--- /dev/null
+++ "b/choieungi/programmers/lv2/\353\215\224\353\247\265\352\262\214/\353\215\224\353\247\265\352\262\214.py"
@@ -0,0 +1,13 @@
+import heapq
+
+def solution(scoville, K):
+    answer = 0
+    heapq.heapify(scoville)
+    while scoville[0]<K:
+        if len(scoville)>=2:
+            heapq.heappush(scoville, (heapq.heappop(scoville))+heapq.heappop(scoville)*2)
+            answer+=1
+        else:
+            return -1
+
+    return answer
\ No newline at end of file
diff --git "a/choieungi/programmers/lv2/\354\206\214\354\210\230\354\260\276\352\270\260/find_primary.py" "b/choieungi/programmers/lv2/\354\206\214\354\210\230\354\260\276\352\270\260/find_primary.py"
new file mode 100644
index 0000000..817283e
--- /dev/null
+++ "b/choieungi/programmers/lv2/\354\206\214\354\210\230\354\260\276\352\270\260/find_primary.py"
@@ -0,0 +1,23 @@
+from itertools import permutations
+
+def check_primary(n):
+    if n == 0 or n == 1: return 0
+    temp = 2
+    while temp < n / 2 + 1:
+        if (n % temp == 0): return 0
+        temp += 1
+    return 1
+
+
+def solution(numbers):
+    answer = 0
+    nums = []
+    numbers = list(numbers)
+    for i in range(1, len(numbers) + 1):
+        for j in list(permutations(numbers, i)):
+            nums.append(int("".join(j)))
+
+    nums = set(nums)
+    for i in nums:
+        answer += check_primary(i)
+    return answer
\ No newline at end of file