贪心 UVA 11729 Commando War

 

题目传送门

 1 /*
 2     贪心：按照执行时间长的优先来排序 
 3 */
 4 #include <cstdio>
 5 #include <algorithm>
 6 #include <iostream>
 7 #include <cstring>
 8 #include <string>
 9 #include <cmath>
10 using namespace std;
11 
12 const int MAXN = 1e3 + 10;
13 const int INF = 0x3f3f3f3f;
14 struct Node {
15     int b, j;
16     bool operator < (const Node &r) const {
17         return j > r.j;
18     }
19 }node[MAXN];
20 
21 int main(void)      //UVA 11729 Commando War
22 {
23     //freopen ("UVA_11729.in", "r", stdin);
24 
25     int n;    int cas = 0;
26     while (scanf ("%d", &n) == 1 && n)
27     {
28         for (int i=1; i<=n; ++i)
29         {
30             scanf ("%d%d", &node[i].b, &node[i].j);
31         }
32 
33         sort (node+1, node+1+n);
34 
35         int ans = 0;    int mx = -1;
36         for (int i=1; i<=n; ++i)
37         {
38             ans += node[i].b;
39             mx = max (mx, ans + node[i].j);
40         }
41 
42         printf ("Case %d: %d\n", ++cas, mx);
43     }
44 
45     return 0;
46 }
47 
48 
49 /*
50 Case 1: 8
51 Case 2: 15
52 */

 

posted @ 2015-07-19 14:04  Running_Time  阅读(129)  评论(0)  编辑  收藏  举报