diff --git a/c/A.c b/c/A.c
new file mode 100644
index 0000000..30815f4
--- /dev/null
+++ b/c/A.c
@@ -0,0 +1,152 @@
+#include <stdio.h>
+#include <string.h>
+
+int main()
+{
+    int array[26];
+    int time = 0;
+    char problem;
+    char RightOrWrong[10];
+    int sum = 0;
+    int solved = 0;
+    int is_solved[26];
+
+    for (int i = 0 ; i < 26; i++){
+        is_solved[i] = 0;
+    }
+
+    for(int i = 0; i < 26; i++)
+    {
+        array[i] = 0;
+    }
+
+    while(scanf("%d %c %s", &time, &problem, &RightOrWrong) == 3 && time != -1){
+
+        
+        switch (problem){
+            case 'A':
+                if (strcmp(RightOrWrong, "wrong")==0){
+                    array[0] += 20;
+                }else{
+                    array[0] += time;
+                    solved += 1;
+                    is_solved[0] = 1;
+                }
+            break;
+            case 'B':
+                if (strcmp(RightOrWrong, "wrong")==0){
+                        array[1] += 20;
+                    }else{
+                        array[1] += time;
+                    solved += 1;
+                    is_solved[1] = 1;
+
+                }   
+            break;
+            case 'C':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[2] += 20;
+                }else{
+                    array[2] += time;
+                    solved += 1;
+                    is_solved[2] = 1;
+
+                }
+            break;
+            case 'D':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[3] += 20;
+                }else{
+                    array[3] += time;
+                    solved += 1;
+                    is_solved[3] = 1;
+
+                }
+            break;
+            case 'E':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[4] += 20;
+                }else{
+                    array[4] += time;
+                    solved += 1;
+                    is_solved[4] = 1;
+
+                }
+            break;
+            case 'F':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[5] += 20;
+                }else{
+                    array[5] += time;
+                    solved += 1;
+                    is_solved[5] = 1;
+
+                }
+            break;
+            case 'G':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[6] += 20;
+                }else{
+                    array[6] += time;
+                    solved += 1;
+                    is_solved[6] = 1;
+
+                }
+            break;
+            case 'H':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[7] += 20;
+                }else{
+                    array[7] += time;
+                    solved += 1;
+                    is_solved[7] = 1;
+
+                }
+            break;
+            case 'I':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[8] += 20;
+                }else{
+                    array[8] += time;
+                    solved += 1;
+                    is_solved[8] = 1;
+
+                }
+            break;
+            case 'J':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[9] += 20;
+                }else{
+                    array[9] += time;
+                    solved += 1;
+                    is_solved[9] = 1;
+
+                }
+            break;
+            case 'K':
+            if (strcmp(RightOrWrong, "wrong")==0){
+                    array[10] += 20;
+                }else{
+                    array[10] += time;
+                    solved += 1;
+                    is_solved[10] = 1;
+
+                }
+            break;
+            default:
+                return 0;
+                break;
+
+        }
+    }
+    for(int i = 0; i <= 26; i++)
+    {
+        if(is_solved[i]==1){
+            sum += array[i];
+        }
+    }
+
+
+    printf("%d %d", solved, sum);
+return 0;
+}
\ No newline at end of file
diff --git a/py/B.py b/py/B.py
new file mode 100644
index 0000000..21807bc
--- /dev/null
+++ b/py/B.py
@@ -0,0 +1,23 @@
+import sys
+
+l = 0
+r = 1001
+m = 500
+temp = m
+
+for i in range(10):
+    print(m)
+    sys.stdout.flush()
+
+    term = input()
+
+    if term == "correct":
+        exit()
+    elif term == "lower":
+        temp = m
+        m = (l + m) // 2
+        r = temp
+    else:
+        temp = m
+        m = (m + r) // 2
+        l = temp
diff --git a/py/C.py b/py/C.py
new file mode 100644
index 0000000..40546f9
--- /dev/null
+++ b/py/C.py
@@ -0,0 +1,12 @@
+ball = 1
+
+for i in range(5):
+    j = int(input())
+    k = int(input())
+
+    if j == ball:
+        ball = k
+    elif k == ball:
+        ball = j
+
+print(ball)
\ No newline at end of file
diff --git a/py/J.py b/py/J.py
new file mode 100644
index 0000000..1ce2976
--- /dev/null
+++ b/py/J.py
@@ -0,0 +1,4 @@
+w = int(input())
+l = int(input())
+
+print(w*l)
\ No newline at end of file