飞花的糖果(计算组合数)

import java.util.*; class Cal{ int n; int m; public Cal(int n,int m) { this.n=n; this.m=m; } int getNum() { int sum=1,t1=1,t2=1,t3=1; int i; for(i=n;i>=1;i--) { t1*=i; } for(i=m;

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