22:58(45pts)

crystal/crystal.cpp

@@ -2,15 +2,35 @@
 using namespace std;
 int n;
 long long m;
-int a[500005];
+long long a[500005];
+long long check(long long now) {
+    int tot = lower_bound(a + 1, a + n + 1, now) - a - 1;
+    // printf("%d\n", tot);
+    long long nowm = m;
+    long long ans = 0;
+    while(a[tot + 1] == now && tot + 1 <= n) tot++;
+    while(nowm >= (now - a[tot]) && tot >= 1) {
+        nowm -= now - a[tot], ans++, tot--;
+        // printf("%lld %d\n", nowm, tot);
+    }
+    return ans;
+}
 int main() {
     freopen("crystal.in", "r", stdin);
-    freopen("crystal.out", "w", stdout);
+    // freopen("crystal.out", "w", stdout);
     scanf("%d%lld", &n, &m);
-    for(int i = 1; i <= n; ++i) scanf("%d", &a[i]);
-    
+    for(int i = 1; i <= n; ++i) scanf("%lld", &a[i]);
+    sort(a + 1, a + n + 1);
+    long long ans = 0;
+    for(int i = 1; i <= n; ++i) {
+        ans = max(ans, check(a[i]));
+    }
+    printf("%lld\n", ans);
+    // printf("%lld\n", check(4));
     return 0;
 }
 /*
 g++ crystal/crystal.cpp -o crystal/crystal -std=c++14 -O2 -static -Wall && cp crystal/crystal ~ && chmod +x ~/crystal && ~/crystal
+O(n log n)
+45pts
 */