'commit'

TangDou/AcWing/1055_1.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+const int N = 1e5 + 10;
+const int INF = 0x3f3f3f3f;
+int n;
+int w[N];
+int f[N][2];//考虑前i天的股市，第i天的手中股票状态为j(j=0 未持股，j=1 持股)
+
+int main() {
+    cin >> n;
+    for (int i = 1; i <= n; i++)cin >> w[i];
+    //base case
+    f[1][0] = 0;
+    f[1][1] = -w[1];
+    for (int i = 2; i <= n; i++) {
+        f[i][0] = max(f[i - 1][0], f[i - 1][1] + w[i]);
+        f[i][1] = max(f[i - 1][1], f[i - 1][0] - w[i]);
+    }
+    printf("%d\n", f[n][0]);
+    return 0;
+}