HDU 2439 the mussels

The musselstime limit: 1000 msmemory limit: 32768 kbthis problem will be judged on HDU. Original ID: 2439
64-bit integer Io format: % i64d Java class name: Main "To be or not to be, that is the question." Now FJ (Frank & John) faces a serious problem.

FJ is breeding mussels these days. The mussels all want to be put into a culturist with a grade no little than their own grades. fj accept their requirements.

FJ provides culturists of different grades, all having a certain capacity. FJ first put mussels into culturists with the same grade until they are full. then he may put some mussels into some potential culturists that still have capacity.

Now, FJ wants to know how many mussels can be put into the culturists.
Inputfor each data set:
The first line contains two integers, N and M (0 <n <= 100000,0 <m <= 1000000), indicating the number of culturists and the number of mussels. the ith culturist has a Grade I, and grade 1 is considered the highest.

The second line contains N integers indicating the culturists 'capacity in order.

The third line contains M integers all in the range 1 ~ N, indicating the mussels 'grade in order.

Proceed to the end of file.
Outputa single integer, which is the number of mussels that can be put into the culturists.
Sample Input

4 4100 4 4 41 2 3 44 31 1 1 14 2 2

Sample output

43

Source2008 Asia Harbin Regional Contest online problem solving: greedy + simulation, just follow the meaning of the question to do it...

 1 #include <iostream> 2 #include <cstdio> 3 #include <cstring> 4 #include <cmath> 5 #include <algorithm> 6 #include <climits> 7 #include <vector> 8 #include <queue> 9 #include <cstdlib>10 #include <string>11 #include <set>12 #include <stack>13 #define LL long long14 #define pii pair<int,int>15 #define INF 0x3f3f3f3f16 using namespace std;17 int cul[100010],tmp,n,m;18 void myscanf(int &x){19     char ch;20     while((ch = getchar()) < ‘0‘ || ch > ‘9‘);21     x = 0;22     x = x*10 + ch - ‘0‘;23     while((ch = getchar()) >= ‘0‘ && ch <= ‘9‘) x = x*10 + ch - ‘0‘;24 }25 int main() {26     while(~scanf("%d %d",&n,&m)){27         for(int i = 1; i <= n; i++)28             myscanf(cul[i]);29         int ans = 0;30         for(int i = 1; i <= m; i++){31             myscanf(tmp);32             if(cul[tmp]){33                 --cul[tmp];34                 ++ans;35             }else{36                 for(int j = tmp; j; --j){37                     if(cul[j]){38                         --cul[j];39                         ++ans;40                         break;41                     }42                 }43             }44         }45         printf("%d\n",ans);46     }47     return 0;48 }

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HDU 2439 the mussels