From 5d1aa225f17f64c35271472c16d63569a48f5ed4 Mon Sep 17 00:00:00 2001
From: Ren Baoshuo <i@baoshuo.ren>
Date: Sun, 21 Nov 2021 16:20:46 +0800
Subject: [PATCH] =?UTF-8?q?P1179=20[NOIP2010=20=E6=99=AE=E5=8F=8A=E7=BB=84?=
 =?UTF-8?q?]=20=E6=95=B0=E5=AD=97=E7=BB=9F=E8=AE=A1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

R63283669
---
 Luogu/P1179/P1179.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Luogu/P1179/P1179.cpp

diff --git a/Luogu/P1179/P1179.cpp b/Luogu/P1179/P1179.cpp
new file mode 100644
index 00000000..50e7724a
--- /dev/null
+++ b/Luogu/P1179/P1179.cpp
@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int l, r, ans;
+
+int cnt2(int x) {
+    int res = 0;
+    while (x) {
+        res += x % 10 == 2;
+        x /= 10;
+    }
+    return res;
+}
+
+int main() {
+    cin >> l >> r;
+    for (int i = l; i <= r; i++) {
+        ans += cnt2(i);
+    }
+    cout << ans << endl;
+    return 0;
+}