diff --git a/0415-t/1.c b/0415-t/1.c
new file mode 100644
index 0000000..b81a501
--- /dev/null
+++ b/0415-t/1.c
@@ -0,0 +1,29 @@
+#include <math.h>
+#include <stdio.h>
+#define for_i(i, range, inner)                                                 \
+    {                                                                          \
+        int i;                                                                 \
+        for (i = 0; i < range; i++)                                            \
+            inner;                                                             \
+    }
+
+void fake_func() {}
+
+int main() {
+    int n, avg = 0, count=0;
+    int a[1005];
+    scanf("%d", &n);
+    for_i(i, n, {
+        int x = 600 * cos(i * 0.35);
+        avg += x;
+        a[i] = x;
+    });
+    avg /= n;
+    for_i(i, n, {
+        if (a[i] < avg) {
+            count++;
+        }
+    });
+    printf("%d\n", count);
+    return 0;
+}
\ No newline at end of file