diff --git a/.clangd b/.clangd
new file mode 100644
index 0000000..e961faa
--- /dev/null
+++ b/.clangd
@@ -0,0 +1,2 @@
+CompileFlags:
+  Add: [-IC:/ProgramData/mingw64/mingw64/include, -IC:/ProgramData/mingw64/mingw64/x86_64-w64-mingw32/include]
\ No newline at end of file
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index d21cdd3..de4c94a 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -3,18 +3,18 @@
         {
             "name": "Win32",
             "includePath": [
-                "${workspaceFolder}/**",
-                "C:/mingw-w64/include",
-                "C:/mingw-w64/x86_64-w64-mingw32/include"
+                // "${workspaceFolder}/**",
+                "C:/ProgramData/mingw64/mingw64/include",
+                "C:/ProgramData/mingw64/mingw64/x86_64-w64-mingw32/include"
             ],
             "defines": [],
             "compilerPath": "gcc",
-            "intelliSenseMode": "clang-x64",
-            "cStandard": "c11",
-            "cppStandard": "c++17",
-            "browse": {
-                "limitSymbolsToIncludedHeaders": true
-            }
+            "intelliSenseMode": "windows-gcc-x64",
+            "cStandard": "c99",
+            "cppStandard": "c++17"
+            // "browse": {
+            //     "limitSymbolsToIncludedHeaders": true
+            // }
         }
     ],
     "version": 4
diff --git a/0303/0.c b/0303/0.c
new file mode 100644
index 0000000..83d6bf0
--- /dev/null
+++ b/0303/0.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    printf("%d", a + b);
+    return 0;
+}
\ No newline at end of file
diff --git a/0303/1.c b/0303/1.c
new file mode 100644
index 0000000..fc8a3e1
--- /dev/null
+++ b/0303/1.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    printf("%d", b / a + 1);
+}
\ No newline at end of file
diff --git a/0303/2.c b/0303/2.c
new file mode 100644
index 0000000..fe53783
--- /dev/null
+++ b/0303/2.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main() {
+    float r;
+    scanf("%f", &r);
+    printf("%.2f\n", 3.14 * r * r);
+}
\ No newline at end of file
diff --git a/0303/3.c b/0303/3.c
new file mode 100644
index 0000000..fac7a6c
--- /dev/null
+++ b/0303/3.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    printf("%.2f\n", (float)a / b);
+}
\ No newline at end of file
diff --git a/0303/4.c b/0303/4.c
new file mode 100644
index 0000000..b540039
--- /dev/null
+++ b/0303/4.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    int n;
+    scanf("%d", &n);
+    printf("%d", n * 10);
+    return 0;
+}
\ No newline at end of file
diff --git a/0303/5.c b/0303/5.c
new file mode 100644
index 0000000..39a01d2
--- /dev/null
+++ b/0303/5.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    int n, m;
+    scanf("%d %d", &n, &m);
+    printf("%d", n % m == 0 ? n / m : n / m + 1);
+    return 0;
+}
\ No newline at end of file
diff --git a/0303/6.c b/0303/6.c
new file mode 100644
index 0000000..03131a0
--- /dev/null
+++ b/0303/6.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main() {
+    char num[] = {getchar(), getchar(), getchar()};
+    putchar(num[2]);
+    putchar(num[1]);
+    putchar(num[0]);
+    return 0;
+}
\ No newline at end of file
diff --git a/0303/7.c b/0303/7.c
new file mode 100644
index 0000000..315e199
--- /dev/null
+++ b/0303/7.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    printf("%d\n", a * b);
+    return 0;
+}
\ No newline at end of file