diff --git "a/src/6week/seoyoon/\353\217\231\354\240\204 0.kt" "b/src/6week/seoyoon/\353\217\231\354\240\204 0.kt"
new file mode 100644
index 0000000..cc1230d
--- /dev/null
+++ "b/src/6week/seoyoon/\353\217\231\354\240\204 0.kt"	
@@ -0,0 +1,13 @@
+package `6week`.seoyoon
+
+fun main() {
+    var (N, K) = readln().split(" ").map{ it.toInt() }
+    val coin = IntArray(N) { readln().toInt() }
+    var cnt = 0
+
+    for (i in N - 1 downTo 0) {
+        cnt += K / coin[i]
+        K = K % coin[i]
+    }
+    println(cnt)
+}
\ No newline at end of file
diff --git "a/src/6week/seoyoon/\354\210\230\353\246\254\352\263\265 \355\225\255\354\212\271.kt" "b/src/6week/seoyoon/\354\210\230\353\246\254\352\263\265 \355\225\255\354\212\271.kt"
new file mode 100644
index 0000000..16015eb
--- /dev/null
+++ "b/src/6week/seoyoon/\354\210\230\353\246\254\352\263\265 \355\225\255\354\212\271.kt"	
@@ -0,0 +1,18 @@
+package `6week`.seoyoon
+
+fun main() {
+    val (N, L) = readln().split(" ").map{ it.toInt() }
+    val water = readln().split(" ").map{ it.toInt() }.toIntArray()
+    var cnt = 1
+
+    water.sort()
+    var tape = water[0] + L - 0.5
+
+    for (i in 1 until N) {
+        if (tape < water[i]) {
+            cnt++
+            tape = water[i] + L - 0.5
+        }
+    }
+    println(cnt)
+}
\ No newline at end of file
diff --git "a/src/6week/seoyoon/\354\213\240\354\236\205 \354\202\254\354\233\220.kt" "b/src/6week/seoyoon/\354\213\240\354\236\205 \354\202\254\354\233\220.kt"
new file mode 100644
index 0000000..e785247
--- /dev/null
+++ "b/src/6week/seoyoon/\354\213\240\354\236\205 \354\202\254\354\233\220.kt"	
@@ -0,0 +1,24 @@
+package `6week`.seoyoon
+
+fun main() {
+    val T = readln().toInt()
+    repeat(T) {
+        val N = readln().toInt()
+        val rank = Array(N, { IntArray(2) })
+        var cnt = 1
+
+        repeat(N) {
+            rank[it] = readln().split(" ").map{ it.toInt() }.toIntArray()
+        }
+        var sorted = rank.sortedBy{ it.first() }
+
+        var compare = sorted[0][1]
+        repeat(N) {
+            if (sorted[it][1] < compare) {
+                cnt++
+                compare = sorted[it][1]
+            }
+        }
+        println(cnt)
+    }
+}
\ No newline at end of file
diff --git "a/src/6week/seoyoon/\354\236\203\354\226\264\353\262\204\353\246\260 \352\264\204\355\230\270.kt" "b/src/6week/seoyoon/\354\236\203\354\226\264\353\262\204\353\246\260 \352\264\204\355\230\270.kt"
new file mode 100644
index 0000000..2dfd534
--- /dev/null
+++ "b/src/6week/seoyoon/\354\236\203\354\226\264\353\262\204\353\246\260 \352\264\204\355\230\270.kt"	
@@ -0,0 +1,14 @@
+package `6week`.seoyoon
+
+fun main() {
+    var answer = 0
+    val str = readln().split("-").toMutableList()
+    repeat(str.size) {
+        if (str[it].contains("+")) {
+            var midSum = str[it].split("+").map{ it.toInt() }.reduce{total, sum -> total + sum}
+            str[it] = midSum.toString()
+        }
+    }
+    answer = str.map{ it.toInt() }.reduce{ total, sum -> total - sum }
+    println(answer)
+}
\ No newline at end of file
diff --git "a/src/6week/seoyoon/\355\201\260 \354\210\230 \353\247\214\353\223\244\352\270\260.kt" "b/src/6week/seoyoon/\355\201\260 \354\210\230 \353\247\214\353\223\244\352\270\260.kt"
new file mode 100644
index 0000000..0007ca1
--- /dev/null
+++ "b/src/6week/seoyoon/\355\201\260 \354\210\230 \353\247\214\353\223\244\352\270\260.kt"	
@@ -0,0 +1,38 @@
+package `6week`.seoyoon
+
+class `큰 수 만들기` {
+    companion object {
+        fun getSolution(): Solution {
+            return Solution()
+        }
+    }
+
+    class Solution {
+        fun solution(number: String, k: Int): String {
+            var answer = StringBuilder()
+            var idx = 0
+
+            for (i in 0 until number.length) {
+                if (answer.length == number.length - k) {
+                    return answer.toString()
+                }
+                var max = 0
+                for (j in idx .. k + i) {
+                    if (number[j].digitToInt() > max) {
+                        max = number[j].digitToInt()
+                        idx = j + 1
+                    }
+                }
+                answer.append(max)
+            }
+            return answer.toString()
+        }
+    }
+}
+
+fun main() {
+    val solution = `큰 수 만들기`.getSolution()
+    println(solution.solution("1924", 2))
+    println(solution.solution("1231234", 3))
+    println(solution.solution("4177252841", 4))
+}
\ No newline at end of file