diff --git a/seong_cheol/.DS_Store b/seong_cheol/.DS_Store
index e39c51b..7d1a75d 100644
Binary files a/seong_cheol/.DS_Store and b/seong_cheol/.DS_Store differ
diff --git a/seong_cheol/220320~220326/22943.cpp b/seong_cheol/220320~220326/22943.cpp
new file mode 100644
index 0000000..c85eb49
--- /dev/null
+++ b/seong_cheol/220320~220326/22943.cpp
@@ -0,0 +1,82 @@
+//
+//  22943.cpp
+//  main
+//
+//  Created by wi_seong on 2022/03/26.
+//
+
+#include <iostream>
+#include <cmath>
+#include <vector>
+
+using namespace std;
+#define ll long long
+int k, m;
+vector<ll> primeNum;
+bool chk1[100001];
+bool chk2[100001];
+int vis[10];
+
+// 에라토스테네스의 체를 이용한 소수 만들기
+void primeNumberSeive(int n) {
+    vector<bool> isPrime(n + 1);
+    for(int i = 2; i <= sqrt(n); i++)  {
+        if(isPrime[i]) continue;
+        for(int j = i * i; j <= n; j += i)
+            isPrime[j] = true;
+    }
+    for(int i = 2; i <= n; i++)
+        if(!isPrime[i]) primeNum.push_back(i);
+}
+
+bool check2(int val) {
+    while(val % m ==0)
+        val /= m;
+    if(chk2[val] == 1)
+        return true;
+    return false;
+}
+
+int comb(int cur, int idx, int max, int val) {
+    if(idx == max) {
+        if(chk1[val] == 1 && check2(val))
+            return 1;
+        return 0;
+    }
+    int ret = 0;
+    for(int i = cur; i <= 9; i++) {
+        if(idx ==0 && i == 0)
+            continue;
+        if(vis[i] == 1)
+            continue;
+        vis[i] = 1;
+        ret += comb(cur, idx + 1, max, val * 10 + i);
+        vis[i] = 0;
+    }
+    
+    return ret;
+}
+
+int main() {
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    cin >> k >> m;
+    primeNumberSeive(m);
+    
+    int primeSize = int(primeNum.size());
+    for(int i = 0; i < primeSize; i++) {
+        for(int j = i + 1; j < primeSize; j++) {
+            if(primeNum[i] + primeNum[j] < 100000)
+                chk1[primeNum[i] + primeNum[j]] = 1;
+        }
+        for(int j = i; j < primeSize; j++) {
+            if(primeNum[i] + primeNum[j] < 100000)
+                chk2[primeNum[i] * primeNum[j]] = 1;
+        }
+    }
+    int ans = comb(0, 0, 1, 0);
+    cout << ans;
+    
+    return 0;
+}
diff --git a/seong_cheol/220320~220326/5052.cpp b/seong_cheol/220320~220326/5052.cpp
new file mode 100644
index 0000000..26a779a
--- /dev/null
+++ b/seong_cheol/220320~220326/5052.cpp
@@ -0,0 +1,35 @@
+//
+//  5052.cpp
+//  main
+//
+//  Created by wi_seong on 2022/03/23.
+//
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using namespace std;
+int n;
+vector<pair<int, string>> v;
+
+int main() {
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+    
+    int t; cin >> t;
+    while(t--) {
+        cin >> n;
+        bool chk = false;
+        for(int i = 0; i < n; i++) {
+            string s; cin >> s;
+            int len = int(s.length());
+            v.push_back({len, s});
+        }
+        for(int i = 0; i < n; i++)
+        if(!chk) cout << "YES" << '\n';
+        else cout << "NO" << '\n';
+    }
+    
+    return 0;
+}
diff --git a/seong_cheol/SJAlgorithm.xcodeproj/project.pbxproj b/seong_cheol/SJAlgorithm.xcodeproj/project.pbxproj
index 5d8fded..b1654d8 100644
--- a/seong_cheol/SJAlgorithm.xcodeproj/project.pbxproj
+++ b/seong_cheol/SJAlgorithm.xcodeproj/project.pbxproj
@@ -27,6 +27,10 @@
 		4D335F8827E75C7E007640F7 /* 5624.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 5624.cpp; sourceTree = "<group>"; };
 		4D335F8927E75C7E007640F7 /* 20154.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 20154.cpp; sourceTree = "<group>"; };
 		4D335F8A27E75C7E007640F7 /* 19539.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 19539.cpp; sourceTree = "<group>"; };
+		4D69A74227F09750003FDE33 /* 8980.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = 8980.cpp; path = ../../Greedy/8980.cpp; sourceTree = "<group>"; };
+		4D69A74327F0975C003FDE33 /* 1978.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = 1978.cpp; path = ../../Math/1978.cpp; sourceTree = "<group>"; };
+		4D69A74527F0B1B7003FDE33 /* 5052.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 5052.cpp; sourceTree = "<group>"; };
+		4D69A74727F0BA4F003FDE33 /* 22943.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 22943.cpp; sourceTree = "<group>"; };
 		4D6C690E27CBAE120081F18A /* 1874.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = 1874.cpp; sourceTree = "<group>"; };
 		4D6C691027CBAE290081F18A /* 17212.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = 17212.cpp; sourceTree = "<group>"; };
 		4D826DA0279D8C7900459892 /* 4096.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = 4096.cpp; sourceTree = "<group>"; };
@@ -80,6 +84,18 @@
 			path = "220313~220319";
 			sourceTree = "<group>";
 		};
+		4D69A73F27F096D9003FDE33 /* 220320~220326 */ = {
+			isa = PBXGroup;
+			children = (
+				4D69A74327F0975C003FDE33 /* 1978.cpp */,
+				4D69A74527F0B1B7003FDE33 /* 5052.cpp */,
+				4D69A74227F09750003FDE33 /* 8980.cpp */,
+				4D69A74727F0BA4F003FDE33 /* 22943.cpp */,
+			);
+			name = "220320~220326";
+			path = "../../../😁/알고리즘/Algorithm/Backjoon/SJAlgorithm/220320~220326";
+			sourceTree = "<group>";
+		};
 		4D6C690D27CBAD890081F18A /* 220220~220226 */ = {
 			isa = PBXGroup;
 			children = (
@@ -131,6 +147,7 @@
 				4D25360927D4E04600405E70 /* 220227~220305 */,
 				4D9811EA27DDEDD900D6740A /* 220306~220312 */,
 				4D335F8627E75C7E007640F7 /* 220313~220319 */,
+				4D69A73F27F096D9003FDE33 /* 220320~220326 */,
 				4DE42969279D8966007BAA4E /* Products */,
 			);
 			sourceTree = "<group>";
diff --git a/seong_cheol/SJAlgorithm.xcodeproj/project.xcworkspace/xcuserdata/wi_seong.xcuserdatad/UserInterfaceState.xcuserstate b/seong_cheol/SJAlgorithm.xcodeproj/project.xcworkspace/xcuserdata/wi_seong.xcuserdatad/UserInterfaceState.xcuserstate
index 2ea22dd..72e914e 100644
Binary files a/seong_cheol/SJAlgorithm.xcodeproj/project.xcworkspace/xcuserdata/wi_seong.xcuserdatad/UserInterfaceState.xcuserstate and b/seong_cheol/SJAlgorithm.xcodeproj/project.xcworkspace/xcuserdata/wi_seong.xcuserdatad/UserInterfaceState.xcuserstate differ