diff --git a/code_study/Baekjoon/c/15829.c b/code_study/Baekjoon/c/15829.c
new file mode 100644
index 0000000..9b32901
--- /dev/null
+++ b/code_study/Baekjoon/c/15829.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main() {
+    int l;
+    char s[51];
+    scanf("%d",&l);
+    scanf("%s",s);
+    
+    long long hash = 0, ri = 1;
+    int m = 1234567891;
+    for(int i=0; s[i]!='\0'; i++) {
+        hash = (hash + (((s[i] - 'a' + 1)%m)*ri)%m)%m;
+        ri = (ri*31)%m;
+    }
+
+    printf("%lld\n",hash);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/code_study/Baekjoon/c/30802.c b/code_study/Baekjoon/c/30802.c
new file mode 100644
index 0000000..9b32901
--- /dev/null
+++ b/code_study/Baekjoon/c/30802.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main() {
+    int l;
+    char s[51];
+    scanf("%d",&l);
+    scanf("%s",s);
+    
+    long long hash = 0, ri = 1;
+    int m = 1234567891;
+    for(int i=0; s[i]!='\0'; i++) {
+        hash = (hash + (((s[i] - 'a' + 1)%m)*ri)%m)%m;
+        ri = (ri*31)%m;
+    }
+
+    printf("%lld\n",hash);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/code_study/Baekjoon/js/15829.js b/code_study/Baekjoon/js/15829.js
new file mode 100644
index 0000000..e775c48
--- /dev/null
+++ b/code_study/Baekjoon/js/15829.js
@@ -0,0 +1,16 @@
+const [l, s] = require("fs").readFileSync(0, "utf8").toString().trim().split('\n');
+let ri = 1, hash = 0;
+const M = 1234567891;
+for(let i=0; i<Number(l); i++) {
+    hash = (hash + (((s[i].charCodeAt() - 'a'.charCodeAt() + 1)%M)*ri))%M;
+    ri = (ri*31)%M;
+}
+console.log(hash);
+
+// const M = BigInt(1234567891);
+// let hash = BigInt(0), ri = BigInt(1);
+// for(let c of s) {
+//     hash += BigInt((c.charCodeAt() - 'a'.charCodeAt() + 1)) * ri;
+//     ri *= BigInt(31);
+// }
+// console.log(hash%M);
\ No newline at end of file
diff --git a/code_study/Baekjoon/js/30802.js b/code_study/Baekjoon/js/30802.js
new file mode 100644
index 0000000..5a7356e
--- /dev/null
+++ b/code_study/Baekjoon/js/30802.js
@@ -0,0 +1,11 @@
+const input = require("fs").readFileSync(0,"utf8").toString().trim().split('\n');
+const n = Number(input[0]);
+const size = input[1].split(' ').map(Number);
+const [t, p] = input[2].split(' ').map(Number);
+
+const total_t = size.reduce((acc,val) => acc + Math.ceil(val/t), 0);
+console.log(total_t);
+
+const pencil_set = Math.floor(n/p);
+const pencil = n%p;
+console.log(pencil_set,pencil);
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/15829.py b/code_study/Baekjoon/python/15829.py
new file mode 100644
index 0000000..c87c86c
--- /dev/null
+++ b/code_study/Baekjoon/python/15829.py
@@ -0,0 +1,8 @@
+l = input()
+Hash = 0
+ri = 1
+M = 1234567891
+for c in input() :
+    Hash = (Hash + ((((ord(c) - ord('a') + 1)%M)*ri)%M))%M
+    ri = ri*31%M
+print(Hash)
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/30802.py b/code_study/Baekjoon/python/30802.py
new file mode 100644
index 0000000..613906f
--- /dev/null
+++ b/code_study/Baekjoon/python/30802.py
@@ -0,0 +1,5 @@
+n = int(input())
+size = map(int, input().split())
+t, p = map(int, input().split())
+print(sum((i+t-1)//t for i in size))
+print(n//p,n%p)
\ No newline at end of file