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- #include <iostream>
- using namespace std;
- int combinationWithRepeatation1(int a, int b){
- int n=a, k=b;
- if(n==1)return 1;
- if(k==1)return n;
- int totalWays=0;
- for(k; k>=0; k--){
- totalWays+=combinationWithRepeatation1(n-1, k);
- }
- return totalWays;
- }
- int combinationWithRepeatation2(int a, int b){
- int n=a, k=b;
- if(n==1)return 1;
- if(k==1)return n;
- int totalWays=0;
- totalWays+=combinationWithRepeatation2(n-1,k)+combinationWithRepeatation2(n,k-1);
- return totalWays;
- }
- int main()
- {
- int n=combinationWithRepeatation2(3,5);
- cout<<n;
- return 0;
- }
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