'commit'

TangDou/LianXiTi50/5.cpp

@@ -0,0 +1,13 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int a;
+    cin >> a;
+    if (a >= 90) cout << "A";
+    else if (a >= 60 && a <= 89) cout << "B";
+    else cout << "C";
+    return 0;
+}
+