Add a lot more problems and a TODO list

2025-10-18 16:54:05 -03:00
parent f82c3630cf
commit f3275cd442
72 changed files with 9550 additions and 17 deletions
--- a/Tags.cpp
+++ b/Tags.cpp
@@ -87,29 +87,35 @@ int main()
        ll y;
        cin >> n >> y;

-        set<int> divs;
        vl fds(n);
        cin >> fds;

-        auto getdivs = [&](ll v) {
-            for (ll i = 1; i * i <= v; i++) {
-                if (v % i == 0) {
-                    divs.insert(i);
-                    divs.insert(v / i);
-                }
+        vl count(2e5 + 1);
+        ll limit = 1;
+        rep(i, n) {
+            count[fds[i]]++;
+            rmax(limit, fds[i]);
+        }
+
+        nrep(i, 1, (int)2e5 + 1) {
+            count[i] += count[i - 1];
+        }
+
+        ll ans = -INT64_MAX >> 1;
+
+        nrep(x, 2, (int)2e5 + 1) {
+            ll now = 0;
+
+            for (int i = 1; i <= (int)2e5; i += x) {
+                int upper = min(i + x - 1, (int)2e5);
+                int act = (i / x) + 1;
+                now += (count[upper] - count[i - 1]) * act;
+                now -= y * max(0LL, (count[upper] - count[i - 1]) - (count[act] - count[act - 1]));
            }
-        };

-        repv(i, fds) {
-            getdivs(i);
+            rmax(ans, now);
        }

-        divs.erase(1);
-
-        ll ans = -1e17;
-
-        repv(j, divs) {
-
-        }
+        cout << ans << '\n';
    }
 }