'commit'

TangDou/AcWing_TiGao/T1/LIS/1017.md

@@ -149,32 +149,32 @@ int main() {
         fl = 0, gl = 0;
 
         cin >> n;
-        for (int i = 1; i <= n; i++) cin >> a[i];
+        for (int i = 0; i < n; i++) cin >> a[i];
 
         // 正着求
-        f[++fl] = a[1];
+        f[0] = a[0];
-        for (int i = 2; i <= n; i++) {
+        for (int i = 1; i < n; i++) {
             if (a[i] > f[fl])
                 f[++fl] = a[i];
             else
-                *lower_bound(f + 1, f + 1 + fl, a[i]) = a[i];
+                *lower_bound(f, f + fl, a[i]) = a[i];
         }
 
         // 前半程的结果
         res = fl;
 
         // 反着求
-        g[++gl] = a[n];
+        g[0] = a[n-1];
-        for (int i = n - 1; i >= 1; i--) {
+        for (int i = n - 1; i >= 0; i--) {
             if (a[i] > g[gl])
                 g[++gl] = a[i];
             else
-                *lower_bound(g + 1, g + 1 + gl, a[i]) = a[i];
+                *lower_bound(g, g + gl, a[i]) = a[i];
         }
         // pk的最大结果
         res = max(res, gl);
         // 输出
-        printf("%d\n", res);
+        printf("%d\n", res + 1);
     }
     return 0;
 }

TangDou/AcWing_TiGao/T1/LIS/1017_TanXin.cpp

@@ -21,32 +21,32 @@ int main() {
         fl = 0, gl = 0;
 
         cin >> n;
-        for (int i = 1; i <= n; i++) cin >> a[i];
+        for (int i = 0; i < n; i++) cin >> a[i];
 
         // 正着求
-        f[++fl] = a[1];
+        f[0] = a[0];
-        for (int i = 2; i <= n; i++) {
+        for (int i = 1; i < n; i++) {
             if (a[i] > f[fl])
                 f[++fl] = a[i];
             else
-                *lower_bound(f + 1, f + 1 + fl, a[i]) = a[i];
+                *lower_bound(f, f + fl, a[i]) = a[i];
         }
 
         // 前半程的结果
         res = fl;
 
         // 反着求
-        g[++gl] = a[n];
+        g[0] = a[n - 1];
-        for (int i = n - 1; i >= 1; i--) {
+        for (int i = n - 1; i >= 0; i--) {
             if (a[i] > g[gl])
                 g[++gl] = a[i];
             else
-                *lower_bound(g + 1, g + 1 + gl, a[i]) = a[i];
+                *lower_bound(g, g + gl, a[i]) = a[i];
         }
         // pk的最大结果
         res = max(res, gl);
         // 输出
-        printf("%d\n", res);
+        printf("%d\n", res + 1);
     }
     return 0;
 }

TangDou/AcWing_TiGao/T1/LIS/896.md

@@ -187,14 +187,14 @@ const int N = 100010;
 
 int n, a[N];
 
-// 数组模拟栈
+// 数组模拟
 int f[N], fl;
 
 int main() {
     cin >> n;
     for (int i = 0; i < n; i++) cin >> a[i];
 
-    // 1、首个元素入栈
+    // 1、首个元素
     f[0] = a[0];
 
     // 2、后续元素开始计算