joj1175

1175: The Binomial Function

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ResultTIME LimitMEMORY LimitRun TimesAC TimesJUDGE3s8192K2794827Standard

1st Jilin University ACM International Collegiate Programming Contest

In this problem, you are to write a program to make the value of the binomial function:

where n and m are integers.

Input Specification

The input consists of several pairs of n and m(0<=n, m<=30). The end of input is marked by n=m=0, which should not be processed.

Output Specification

For each pair of n and m, you should print a line like this: "Binom(n, m) = v", where n, m and v have to be replaced by the values of n, m and v.

Sample Input

5 57 05 90 0

Sample Output

Binom(5, 5) = 1Binom(7, 0) = 1Binom(5, 9) = 32

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This problem is used for contest: 110 

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Problem Set with Online Judge System Version 3.12
Jilin University

Developed by skywind, SIYEE

 

 

 

 

 

#include<cstdio>
#include<cstring>
using namespace std;
int Binom[35][35];
void cal()
{
 for(int i=0;i<=31;i++)
 {
  Binom[i][0]=1;
  Binom[0][i]=1;
  Binom[i][i]=1;
 }
 for(int i=1;i<=31;i++)
 {
  for(int j=1;j<=31;j++)
  {
   if(i!=j)
   Binom[i][j]=Binom[i-1][j]+Binom[i-1][j-1];
  }
 }
}
int main()
{
 //freopen("in.txt","r",stdin);
 cal();
 int n,m;
 while(scanf("%d%d",&n,&m))
 {
  if(n==0&&m==0)break;
  printf("Binom(%d, %d) = %d\n",n,m,Binom[n][m]);
 }
 return 0;
}