Precreation contest files

misc/binary-search/ptit126j.cpp

@@ -0,0 +1,42 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int a[1000000];
+int n, m;
+
+int check(int k) {
+  int res = 0;
+  for (int i = 0; i < n; i++) {
+    if (a[i] - k > 0)
+      res += a[i] - k;
+  }
+  return res;
+}
+
+int main() {
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+
+  freopen("ptit126j.inp", "r", stdin);
+
+  cin >> n >> m;
+  for (int i = 0; i < n; i++)
+    cin >> a[i];
+  sort(a, a + n);
+
+  // 10 15 17 20
+  int l = 0, r = a[n - 1];
+  int res = a[n - 1];
+  while (l < r) {
+    int mid = (l + r) / 2;
+
+    if (check(mid) >= m) {
+      // cout << mid << "\n";
+      res = mid;
+      l = mid + 1;
+    } else {
+      r = mid;
+    }
+  }
+  cout << res << '\n';
+}