new file: P1314.cpp

2026-07-19 18:29:19 +08:00
parent 565add3405
commit 46aaf28223
1 changed files with 72 additions and 0 deletions
@@ -0,0 +1,72 @@
+#include <bits/stdc++.h>
+#define int long long
+using namespace std;
+int n, m, s;
+struct k
+{
+    int w, v;
+} kuang[200005];
+struct q
+{
+    int l, r;
+} qu[200005];
+int precnt[200005], pre[200005];
+/*
+大于W的数量*大于W的v的和
+*/
+int query(int w)
+{
+    memset(precnt, 0, sizeof precnt);
+    memset(pre, 0, sizeof pre);
+    int ans = 0;
+    for (int i = 1; i <= n; ++i)
+    {
+        if (kuang[i].w > w)
+            pre[i] = pre[i - 1] + kuang[i].v, precnt[i] = precnt[i - 1] + 1;
+        else
+            pre[i] = pre[i - 1], precnt[i] = precnt[i - 1];
+    }
+    for (int i = 1; i <= m; ++i)
+    {
+        int cnt = precnt[qu[i].r] - precnt[qu[i].l - 1], sumv = pre[qu[i].r] - pre[qu[i].l - 1];
+        // for (int j = qu[i].l; j <= qu[i].r; ++j)
+        // {
+        //     if (kuang[j].w > w)
+        //         cnt++, sumv += kuang[j].v;
+        // }
+        ans += cnt * sumv;
+    }
+    return ans - s;
+}
+signed main()
+{
+    scanf("%lld%lld%lld", &n, &m, &s);
+    int maxwj = 0;
+    for (int i = 1; i <= n; ++i)
+    {
+        scanf("%lld%lld", &kuang[i].w, &kuang[i].v);
+        maxwj = max(maxwj, kuang[i].w);
+    }
+    for (int i = 1; i <= m; ++i)
+        scanf("%lld%lld", &qu[i].l, &qu[i].r);
+    int l = 0, r = LONG_LONG_MAX, mid;
+    int ans = LONG_LONG_MAX;
+    while (l <= r)
+    {
+        mid = (l + r) / 2;
+        if (query(mid) < 0)
+            r = mid - 1;
+        else
+            l = mid + 1;
+        ans = min(abs(query(mid)), ans);
+    }
+    printf("%lld\n", ans);
+    /*
+    int mina = INT_MAX;
+    for (int i = 0; i <= r; ++i)
+    {
+        mina = min(mina, abs(query(i)));
+    }
+    printf("%d\n", mina);*/
+    return 0;
+}