1286. 怪盗基德的滑翔翼

http://ybt.ssoier.cn:8088/statusx.php?runidx=15575223

ybt/1286/1286.cpp

@@ -0,0 +1,47 @@
+#include <algorithm>
+#include <cstring>
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 105;
+
+int t, n, a[N], f[N], g[N], ans;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> t;
+    while (t--) {
+        ans = 0;
+
+        cin >> n;
+        for (int i = 1; i <= n; i++) {
+            cin >> a[i];
+        }
+
+        for (int i = 1; i <= n; i++) {
+            f[i] = 1;
+            for (int j = 1; j < i; j++) {
+                if (a[i] > a[j]) f[i] = std::max(f[i], f[j] + 1);
+            }
+        }
+
+        for (int i = n; i; i--) {
+            g[i] = 1;
+            for (int j = n; j > i; j--) {
+                if (a[i] > a[j]) g[i] = std::max(g[i], g[j] + 1);
+            }
+        }
+
+        for (int i = 1; i <= n; i++) {
+            ans = std::max({ans, f[i], g[i]});
+        }
+
+        cout << ans << endl;
+    }
+
+    return 0;
+}