HihoCoder - 1631-Cats and Fish

题目链接

思路:

刚开始的时候,如果骨头数量足够多,没条狗都有骨头吃,可以直接 m-=n。如果不大于,那就剪枝出去了

当骨头足够多的时候,按照时间的路线,吃的快的狗总是先吃。如果骨头没了,over

 1 /*
 2     Name:
 3     Copyright:
 4     Author:
 5     Date: 2018/5/7 20:13:00
 6     Description:
 7 */
 8 #include <algorithm>
 9 #include <iostream>
10 #include <cstdio>
11 #include <cstring>
12 using namespace std;
13 int arr[105];
14 int speed[105];
15 int main()
16 {
17     int m, n, x;
18     ios::sync_with_stdio(false);
19     while (cin>>m>>n>>x)  {
20         memset(arr, 0, sizeof(arr));
21         memset(speed, 0, sizeof(speed));
22         for (int i=0; i<n; i++) cin>>speed[i];
23         sort (speed, speed+n);
24         for (int i=1;i <= x; i++) {
25             if (m <= 0) break;
26             for (int j=0; j<n; j++) {
27                 if (m <= 0) break;
28                 if (arr[j] == 0) m--;
29                 if (i % speed[j] == 0) {
30                     arr[j] = 0;
31                 } else arr[j] = 1;
32             }
33         }
34         int sum = 0;
35         for (int i=0; i<n; i++) {
36             if (arr[i] != 0)sum++;
37         }
38         cout<<m<<" "<<sum<<endl;
39     }
40     return 0;
41 }

 

posted @ 2018-05-07 21:05  朤尧  阅读(375)  评论(0编辑  收藏  举报