Jobdu 题目1531 - 货币面值


http://www.cnblogs.com/easonliu/p/3899195.html
小虎是游戏中的一个国王,在他管理的国家中发行了很多不同面额的纸币,用这些纸币进行任意的组合可以在游戏中购买各种装备来提升自己。有一天,他突然很想知道这些纸币的组合不能表示的最小面额是多少,请聪明的你来帮助小虎来解决这个财政问题吧。
输入:
输入包含多个测试用例,每组测试用例的第一行输入一个整数N(N<=100)表示流通的纸币面额数量,第二行是N个纸币的具体表示面额,取值[1,100]。
输出:
对于每组测试用例,输出一个整数,表示已经发行的所有纸币都不能表示的最小面额(已经发行的每个纸币面额最多只能使用一次,但面值可能有重复)。
样例输入:
5
1 2 3 9 100
5
1 2 4 9 100
5
1 2 4 7 100
样例输出:
7
8
15

 7 int n;
 8 int a[100];
 9 bool dp[10001];
10  
11 void getRes() {
12     memset(dp, false, 10001);
13     dp[0] = true;
14     sort(a, a + n);
15     for (int i = 0; i < n; ++i) {
16         for (int j = 10001 - a[i]; j >= 0; --j) {
17             if (dp[j])
18                 dp[j + a[i]] = true;
19         }
20     }
21     for (int i = 0; i < 10001; ++i) {
22         if (!dp[i]) {
23             cout << i << endl;
24             break;
25         }
26     }
27  
28 }
29  
30 int main() {
31     while (cin >> n) {
32         for (int i = 0; i < n; ++i) {
33             cin >> a[i];
34         }
35         getRes();
36     }
37  
38     return 0;
39 }

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