计蒜客_跳跃游戏

 1 #include <iostream>
 2 #include <algorithm>
 3 using namespace std;
 4 int length[510];
 5 int flag[510];
 6 int n;
 7 
 8 bool dfs(int now)
 9 {
10         if (now == n - 1)       return true;
11         if (flag[now])  return false;
12         for (int i = length[now]; i > 0; --i)
13                 if (dfs(now + i))
14                         return true;
15         flag[now] = 1;/*第一次忘记标记->然后一组数据超时*/
16         return false;
17 }
18 int main()
19 {
20         while (cin >> n) {
21                 fill(flag, flag + n, 0);
22                 for (int i = 0; i < n; ++i)     cin >> length[i];
23                 cout << (dfs(0) ? "true" : "false") << endl;
24         }
25         return 0;
26 }