洛谷 P1288 取数游戏II

 1 #include<cstdio>
 2 int n,l1,r1,a[31];
 3 int main()
 4 {
 5     int i;
 6     scanf("%d",&n);
 7     for(i=1;i<=n;i++)
 8         scanf("%d",&a[i]);
 9     for(l1=1;l1<=n;l1++)
10         if(a[l1]==0)
11             break;
12     for(r1=n;r1>=1;r1--)
13         if(a[r1]==0)
14             break;
15     l1--;
16     r1++;
17     r1=n-r1+1;
18     if(l1==n)
19     {
20         if(n%2==1)
21             puts("YES");
22         else
23             puts("NO");
24         return 0;
25     }
26     else if(l1%2==1||r1%2==1)
27     {
28         puts("YES");
29     }
30     else puts("NO");
31     return 0;
32 }