C - Emojis

https://codeforces.com/gym/102566/submission/174071209

Gym/102566/C/C.cpp

@@ -0,0 +1,77 @@
+#include <iostream>
+#include <algorithm>
+#include <limits>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e5 + 5;
+
+int t, n, a[N];
+std::pair<int, int> c[N];
+
+void insert(int x, std::pair<int, int> y) {
+    for (; x < N; x += x & -x) c[x] = std::max(c[x], y);
+}
+
+std::pair<int, int> query(int x) {
+    std::pair<int, int> ans{0, 0};
+    for (; x; x -= x & -x) ans = std::max(ans, c[x]);
+    return ans;
+}
+
+void clear(int x) {
+    for (; x < N; x += x & -x) c[x] = std::make_pair(0, 0);
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> t;
+
+    while (t--) {
+        int ans = 0, min = std::numeric_limits<int>::max();
+        std::vector<int> nums;
+
+        cin >> n;
+
+        for (int i = 1; i <= n; i++) {
+            cin >> a[i];
+
+            nums.emplace_back(a[i]);
+        }
+
+        std::sort(nums.begin(), nums.end());
+        nums.erase(std::unique(nums.begin(), nums.end()), nums.end());
+
+        for (int i = 1; i <= n; i++) {
+            a[i] = std::lower_bound(nums.begin(), nums.end(), a[i]) - nums.begin() + 1;
+        }
+
+        for (int i = 1; i <= n; i++) {
+            auto res = query(a[i]);
+
+            res.first++;
+            if (res.first == 1) res.second = i;
+            if (res.first > ans) {
+                ans = res.first;
+                min = i - res.second + 1 - res.first;
+            } else if (res.first == ans) {
+                min = std::min(min, i - res.second + 1 - res.first);
+            }
+
+            insert(a[i], res);
+        }
+
+        for (int i = 1; i <= n; i++) {
+            clear(a[i]);
+        }
+
+        cout << ans << ' ' << min << endl;
+    }
+
+    return 0;
+}