From 5d0e00416e81c3e0ee1b69ff778e8cc0885a3d80 Mon Sep 17 00:00:00 2001
From: Ren Baoshuo <i@baoshuo.ren>
Date: Wed, 30 Dec 2020 21:40:20 +0800
Subject: [PATCH] =?UTF-8?q?P1873=20=E7=A0=8D=E6=A0=91?=
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R44441314
---
 problem/P1873/P1873.cpp | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 problem/P1873/P1873.cpp

diff --git a/problem/P1873/P1873.cpp b/problem/P1873/P1873.cpp
new file mode 100644
index 00000000..372a64e2
--- /dev/null
+++ b/problem/P1873/P1873.cpp
@@ -0,0 +1,35 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+
+long long n, m, l, r, ans, a[1000005];
+
+bool check(long long x) {
+    long long t = 0;
+    for (long long i = 1; i <= n; i++) {
+        if (a[i] > x) {
+            t += a[i] - x;
+        }
+    }
+    return t >= m;
+}
+
+int main() {
+    cin >> n >> m;
+    for (long long i = 1; i <= n; i++) {
+        cin >> a[i];
+        r = max(r, a[i]);
+    }
+    while (l <= r) {
+        long long mid = l + r >> 1;
+        if (check(mid)) {
+            l = (ans = mid) + 1;
+        }
+        else {
+            r = mid - 1;
+        }
+    }
+    cout << ans << endl;
+    return 0;
+}