【HDOJ】1539 Shredding Company

DFS。

 1 /* 1539 */
 2 #include <iostream>
 3 #include <cstdio>
 4 #include <cstring>
 5 #include <cstdlib>
 6 #include <vector>
 7 using namespace std;
 8 
 9 #define INF 0xfffffff
10 
11 int Q[105];
12 char s[55];
13 int ans;
14 int t, len;
15 bool flag;
16 vector<int> tb;
17 
18 void dfs(int beg, int sum, int n) {
19     int i, j, k, tmp;
20     
21     if (beg == len) {
22         if (sum<=t && sum>ans) {
23             tb.clear();
24             for (i=0; i<n; ++i)
25                 tb.push_back(Q[i]);
26             ans = sum;
27             flag = false;
28             n = 0;
29         } else if (sum == ans) {
30             flag = true;
31         }
32         return ;
33     }
34     
35     for (i=beg; i<len; ++i) {
36         tmp = 0;
37         for (j=beg; j<=i; ++j)
38             tmp = 10*tmp+s[j]-'0';
39         Q[n] = tmp;
40         dfs(i+1, sum+tmp, n+1);
41     }
42 }
43 
44 int main() {
45     int i, j, k, tmp;
46     int sum;
47     
48     #ifndef ONLINE_JUDGE
49         freopen("data.in", "r", stdin);
50     #endif
51     
52     while (scanf("%d %s", &t, s) != EOF) {
53         if (t==0 && s[0]=='0' && s[1]=='\0')
54             break;
55         sum = 0;
56         tmp = 0;
57         for (i=0; s[i]; ++i) {
58             tmp = 10*tmp+s[i]-'0';
59             sum += s[i]-'0';
60         }
61         len = i;
62         if (sum > t) {
63             printf("error\n");
64             continue;
65         }
66         if (tmp == t) {
67             printf("%d %s\n", t, s);
68             continue;
69         }
70         flag = false;
71         ans = -1;
72         tb.clear();
73         dfs(0, 0, 0);
74         if (flag) {
75             printf("rejected\n");
76         } else {
77             printf("%d", ans);
78             for (i=0; i<tb.size(); ++i)
79                 printf(" %d", tb[i]);
80             printf("\n");
81         }
82     }
83     
84     return 0;
85 }

 

posted on 2015-01-24 23:19  Bombe  阅读(197)  评论(0)  编辑  收藏  举报

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