P3611 [USACO17JAN]Cow Dance Show S

R53543946

Luogu/problem/P3611/P3611.cpp

@@ -0,0 +1,53 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, t, l, r, d[10005];
+
+int check(int x) {
+    int f = 0;
+    priority_queue<int, vector<int>, greater<int>> q;
+    for (int i = 1; i <= x; i++) {
+        q.push(d[i]);
+    }
+    if (f > t) {
+        return false;
+    }
+    int z = x + 1, c = 0;
+    for (int i = z; i <= n; i++) {
+        f += q.top() - c;
+        c = q.top();
+        q.pop();
+        if (f > t) {
+            return false;
+        }
+        q.push(d[i] + c);
+    }
+    for (int i = 1; i <= x; i++) {
+        f += q.top() - c;
+        c = q.top();
+        q.pop();
+        if (f > t) {
+            return false;
+        }
+    }
+    return true;
+}
+
+int main() {
+    cin >> n >> t;
+    for (int i = 1; i <= n; i++) {
+        cin >> d[i];
+    }
+    l = 0, r = n;
+    while (l <= r) {
+        int mid = l + r >> 1;
+        if (check(mid)) {
+            r = mid - 1;
+        } else {
+            l = mid + 1;
+        }
+    }
+    cout << l << endl;
+    return 0;
+}