diff --git a/.gitignore b/.gitignore
index 1ffadeb..9a43c95 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,7 @@ venv
 .ipynb_checkpoints
 
 __init__.py
-**/test_*.py
\ No newline at end of file
+**/test_*.py
+
+*.exe
+a.out
\ No newline at end of file
diff --git a/zeta_cpp/completed/25206.cpp b/zeta_cpp/completed/25206.cpp
new file mode 100644
index 0000000..b6d93c4
--- /dev/null
+++ b/zeta_cpp/completed/25206.cpp
@@ -0,0 +1,52 @@
+#include<iostream>
+
+double convert_grade(const std::string &g);
+
+int main() {
+    double sum_of_score = 0;
+    double sum_of_prod_score_grade = 0;
+    for (int i = 0; i < 20; i++) {
+        std::string category;
+        double score;
+        std::string grade;
+        std::cin >> category >> score >> grade;
+        double s_grade = convert_grade(grade);
+        if (s_grade < 0) {
+            continue;
+        } else {
+            sum_of_score += score;
+            sum_of_prod_score_grade += score * s_grade;
+        }
+
+
+    }
+
+    std::cout << sum_of_prod_score_grade / sum_of_score;
+    return 0;
+}
+
+double convert_grade(const std::string &g) {
+    if (g == "A+") {
+        return 4.5;
+    } else if (g == "A0") {
+        return 4.0;
+    } else if (g == "B+") {
+        return 3.5;
+    } else if (g == "B0") {
+        return 3.0;
+    } else if (g == "C+") {
+        return 2.5;
+    } else if (g == "C0") {
+        return 2.0;
+    } else if (g == "D+") {
+        return 1.5;
+    } else if (g == "D0") {
+        return 1.0;
+    } else if (g == "F") {
+        return 0.0;
+    } else {
+        return -1.0;
+    }
+
+
+}
\ No newline at end of file
diff --git a/zeta_python/completed/25083.py b/zeta_python/completed/25083.py
new file mode 100644
index 0000000..7898c08
--- /dev/null
+++ b/zeta_python/completed/25083.py
@@ -0,0 +1,6 @@
+print("""         ,r'"7
+r`-_   ,'  ,/
+ \. ". L_r'
+   `~\/
+      |
+      |""")
\ No newline at end of file
diff --git a/zeta_python/completed/3003.py b/zeta_python/completed/3003.py
new file mode 100644
index 0000000..97d58b5
--- /dev/null
+++ b/zeta_python/completed/3003.py
@@ -0,0 +1,10 @@
+chess_set = [1, 1, 2, 2, 2, 8, ]
+
+my_set = list(map(int, input().split()))
+
+delta_set = []
+
+for u, v in zip(chess_set, my_set):
+    delta_set.append(u - v)
+
+print(" ".join(map(str, delta_set)))