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