diff --git "a/0704/bronze-21\353\260\225\354\204\234\354\233\220.py" "b/0704/bronze-21\353\260\225\354\204\234\354\233\220.py"
new file mode 100644
index 0000000..6255e5a
--- /dev/null
+++ "b/0704/bronze-21\353\260\225\354\204\234\354\233\220.py"
@@ -0,0 +1,6 @@
+for i in range(int(input())):
+    x,y = map(int, input().split())
+    x = x%10; y = y%4+4
+    result = x**y%10
+    if result == 0: print(10)
+    else: print(result)
diff --git "a/0704/gold-21\353\260\225\354\204\234\354\233\220.py" "b/0704/gold-21\353\260\225\354\204\234\354\233\220.py"
new file mode 100644
index 0000000..dcbfc82
--- /dev/null
+++ "b/0704/gold-21\353\260\225\354\204\234\354\233\220.py"
@@ -0,0 +1,46 @@
+class dice:
+    def __init__(self, n,m,y,x,k, map_):
+        self.mapsize = [n,m]; self.loc = [y,x]; self.cmd_ = k
+        self.mapnum = map_;
+        self.dx = [0,1,-1, 0, 0]; self.dy = [0,0,0,-1,1]; self.tmp = [0]*7
+    def check(self, i):
+        y,x = self.loc[0], self.loc[1];
+        if 0<=self.dx[i]+x and self.dx[i]+x<self.mapsize[1] and 0<=self.dy[i]+y and self.dy[i]+y<self.mapsize[0]:
+            self.loc[0] += self.dy[i]; self.loc[1] += self.dx[i]; 
+            return 1
+        return 0
+    def east(self): 
+        self.tmp[1], self.tmp[4] = self.tmp[4],self.tmp[1]; 
+        self.tmp[4], self.tmp[6] = self.tmp[6],self.tmp[4]; 
+        self.tmp[3], self.tmp[6] = self.tmp[6],self.tmp[3];
+    def west(self):
+        self.tmp[1], self.tmp[3] = self.tmp[3],self.tmp[1]; 
+        self.tmp[3], self.tmp[6] = self.tmp[6],self.tmp[3]; 
+        self.tmp[4], self.tmp[6] = self.tmp[6],self.tmp[4];
+    def north(self):
+        self.tmp[1], self.tmp[5] = self.tmp[5],self.tmp[1]; 
+        self.tmp[5], self.tmp[6] = self.tmp[6],self.tmp[5]; 
+        self.tmp[2], self.tmp[6] = self.tmp[6],self.tmp[2];
+    def south(self):
+        self.tmp[1], self.tmp[2] = self.tmp[2],self.tmp[1]; 
+        self.tmp[2], self.tmp[6] = self.tmp[6],self.tmp[2]; 
+        self.tmp[5], self.tmp[6] = self.tmp[6],self.tmp[5];
+    def ans(self):
+        y,x = self.loc[0], self.loc[1]
+        if self.mapnum[y][x] != 0: self.tmp[6] = self.mapnum[y][x];self.mapnum[y][x] = 0
+        else: self.mapnum[y][x] = self.tmp[6]
+        print(self.tmp[1])
+
+
+n,m,y,x,k = map(int, input().split())
+map_ = [list(map(int, input().split())) for _ in range(n)]
+cmd = list(map(int, input().split()))
+
+game = dice(n,m,y,x,k, map_)
+for i in cmd:
+    if game.check(i):
+        if i == 1: game.east()
+        elif i == 2: game.west()
+        elif i == 3: game.north()
+        elif i==4: game.south()
+        game.ans()
diff --git "a/0704/silver-21\353\260\225\354\204\234\354\233\220.py" "b/0704/silver-21\353\260\225\354\204\234\354\233\220.py"
new file mode 100644
index 0000000..0fc4695
--- /dev/null
+++ "b/0704/silver-21\353\260\225\354\204\234\354\233\220.py"
@@ -0,0 +1,7 @@
+n = input().split('-')
+n[0] = sum(map(int,n[0].split('+')))
+
+for i in range(1,len(n)):
+    n[i] = -sum(map(int,n[i].split('+')))
+
+print(sum(n))