cf B. Color the Fence

http://codeforces.com/contest/349/problem/B

贪心

 1 #include <cstdio>

 2 #include <cstring>

 3 #include <algorithm>

 4 using namespace std;

 5 const int inf=1<<30;

 6 

 7 int a[10];

 8 int v,k;

 9 int main()

10 {

11     while(scanf("%d",&v)!=EOF)

12     {

13         int min1=inf;

14         k=0;

15         for(int i=1; i<=9; i++)

16         {

17             scanf("%d",&a[i]);

18             if(a[i]<min1)

19             {

20                 min1=a[i];

21                 k=i;

22             }

23             else if(a[i]==min1&&k<i)

24             {

25                 k=i;

26             }

27         }

28         if(v<min1)

29         {

30             printf("-1\n");

31             continue;

32         }

33         if(v%min1==0)

34         {

35             int m=v/min1;

36             for(int i=1; i<=m; i++)

37             {

38                 printf("%d",k);

39             }

40             printf("\n");

41         }

42         else

43         {

44             int len=v/min1;

45             for(int j=len; j>=1; j--)

46             {

47                 for(int i=9; i>=1; i--)

48                 {

49                     int x=v-a[i];

50                     if(x<0) continue;

51                     if(x/min1==j-1)

52                     {

53                         printf("%d",i);

54                         v-=a[i];

55                         break;

56                     }

57                 }

58             }

59             printf("\n");

60         }

61     }

62     return 0;

63 }

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