diff --git a/P1031.cpp b/P1031.cpp
new file mode 100644
index 0000000..05faa75
--- /dev/null
+++ b/P1031.cpp
@@ -0,0 +1,22 @@
+#include <cstdio>
+using namespace std;
+int a[105];
+int main()
+{
+    int n, sum = 0;
+    scanf("%d", &n);
+    for (int i = 1; i <= n; ++i)
+    {
+        scanf("%d", &a[i]);
+        sum += a[i];
+    }
+    int avg = sum / n, ans = 0, pre = 0;
+    for (int i = 1; i < n; ++i)
+    {
+        pre += a[i] - avg;
+        if (pre != 0)
+            ans++;
+    }
+    printf("%d\n", ans);
+    return 0;
+}
\ No newline at end of file