'commit'

TangDou/XiTi/1224.cpp

@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int old;
+    cin >> old;
+    if (old <= 50) cout << old << endl;
+    if (old > 50 && old <= 150) cout << 50 + (old - 50) * 0.9 << endl;
+    if (old > 150) cout << 50 + (150 - 50) * 0.9 + (old - 150) * 0.8 << endl;
+    return 0;
+}