From d100f0e79fbc80a8e9045294bb364d6bc88db9b3 Mon Sep 17 00:00:00 2001
From: Baoshuo Ren <i@baoshuo.ren>
Date: Thu, 2 Dec 2021 13:34:52 +0800
Subject: [PATCH] =?UTF-8?q?P1314=20[NOIP2011=20=E6=8F=90=E9=AB=98=E7=BB=84?=
 =?UTF-8?q?]=20=E8=81=AA=E6=98=8E=E7=9A=84=E8=B4=A8=E7=9B=91=E5=91=98?=
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R64081915
---
 Luogu/P1314/P1314.cpp | 56 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Luogu/P1314/P1314.cpp

diff --git a/Luogu/P1314/P1314.cpp b/Luogu/P1314/P1314.cpp
new file mode 100644
index 00000000..de65e98a
--- /dev/null
+++ b/Luogu/P1314/P1314.cpp
@@ -0,0 +1,56 @@
+#include <bits/stdc++.h>
+
+using std::cin;
+using std::cout;
+using std::endl;
+
+int n, m, l, r, w[200005], v[200005];
+long long s, y, sum, ans, fn[200005], fv[200005];
+std::pair<int, int> q[200005];
+
+bool check(int x) {
+    y = sum = 0;
+    memset(fn, 0x00, sizeof(fn));
+    memset(fv, 0x00, sizeof(fv));
+    for (int i = 1; i <= n; i++) {
+        if (w[i] >= x) {
+            fn[i] = fn[i - 1] + 1;
+            fv[i] = fv[i - 1] + v[i];
+        } else {
+            fn[i] = fn[i - 1];
+            fv[i] = fv[i - 1];
+        }
+    }
+    for (int i = 1; i <= m; i++) {
+        y += (fn[q[i].second] - fn[q[i].first - 1]) * (fv[q[i].second] - fv[q[i].first - 1]);
+    }
+    sum = std::abs(y - s);
+    return y > s;
+}
+
+int main() {
+    ans = std::numeric_limits<long long>::max();
+    l = std::numeric_limits<int>::max();
+    r = std::numeric_limits<int>::min();
+    cin >> n >> m >> s;
+    for (int i = 1; i <= n; i++) {
+        cin >> w[i] >> v[i];
+        l = std::min(l, w[i]);
+        r = std::max(r, w[i]);
+    }
+    for (int i = 1; i <= m; i++) {
+        cin >> q[i].first >> q[i].second;
+    }
+    l -= 1, r += 2;
+    while (l <= r) {
+        int mid = l + r >> 1;
+        if (check(mid)) {
+            l = mid + 1;
+        } else {
+            r = mid - 1;
+        }
+        ans = std::min(ans, sum);
+    }
+    cout << ans << endl;
+    return 0;
+}