'commit'

TangDou/LanQiaoBei/LanQiao14GuoSai/5_1.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+const int N = 500010;
+int f[N][2];
+int a[N];
+
+int main() {
+    freopen("5.in", "r", stdin);
+    int n;
+    cin >> n;
+    for (int i = 1; i <= n; i++) cin >> a[i];
+    /*
+    8
+    1 2 8 3 3 4 4 5
+
+    10
+    8 1 1 2 3 4 5 6 7 8
+    */
+    // 1、处理f[i][1]
+    for (int i = 1; i <= n; i++) {
+        if (a[i] == a[i - 1]) f[i][1] = a[i] + 1;
+        if (a[i] == f[i - 1][1]) f[i][1] = a[i] + 1;
+    }
+
+    // 2、处理f[i][0]
+    for (int i = 1; i <= n; i++) f[i][0] = max({a[i], f[i - 1][0], f[i - 1][1]});
+
+    cout << max(f[n][0], f[n][1]) << endl;
+
+    return 0;
+}