From db3c85389325fe18c19287dc4747a5641ef73169 Mon Sep 17 00:00:00 2001
From: Baoshuo <i@baoshuo.ren>
Date: Mon, 12 Sep 2022 21:35:38 +0800
Subject: [PATCH] =?UTF-8?q?1995=20-=20=E6=9A=97=E5=BD=B1=E5=B2=9B=E7=9A=84?=
 =?UTF-8?q?=E6=AD=8C=E5=A3=B0?=
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77471
---
 bjtu/1995/1995.cpp | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 bjtu/1995/1995.cpp

diff --git a/bjtu/1995/1995.cpp b/bjtu/1995/1995.cpp
new file mode 100644
index 00000000..d3411789
--- /dev/null
+++ b/bjtu/1995/1995.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+#include <iomanip>
+#include <string>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const double d[] = {0, 261.6, 293.6, 329.6, 349.2, 392.0, 440.0, 493.8};
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    std::string s;
+    double ans = 0;
+
+    cin >> s;
+
+    for (int i = 1; i < s.size(); i++) {
+        if (s[i] == '-') s[i] = s[i - 1];
+    }
+
+    for (char c : s) {
+        ans += d[c - '0'];
+    }
+
+    cout << std::fixed << std::setprecision(6) << ans / s.size() << endl;
+
+    return 0;
+}