NWERC 2012 Problem J Joint Venture

刚刚开始想的是用二分的方法做,没想到这个题目这么水,直接暴力就行;

代码:

 1 #include<cstdio>
 2 #include<algorithm>
 3 #define maxn 1000005
 4 using namespace std;
 5 int num[maxn];
 6 
 7 int main()
 8 {
 9     int x,n,y,ma;
10     while(scanf("%d",&x)!=EOF)
11     {
12         ma=x*10000000;
13         scanf("%d",&n);
14         for(int i=0;i<n;i++)
15             scanf("%d",&num[i]);
16         sort(num,num+n);
17         x=0,y=n-1;
18         bool flag=0;
19         while(x<y)
20         {
21             if(num[x]+num[y]>ma)y--;
22             else if(num[x]+num[y]<ma)x++;
23             else {flag=1;break;}
24         }
25         if(flag==1)printf("yes %d %d\n",num[x],num[y]);
26         else puts("danger");
27     }
28     return 0;
29 }
View Code

 

posted @ 2013-10-05 16:20  Yours1103  阅读(210)  评论(0编辑  收藏  举报