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#include <iostream> using namespace std; int fak(int n){ int ans=1; while(n>0){ ans *= n; n--; } return ans; } int main(){ int k, n, m; int x=0; cin>>k>>n>>m; x = n - (m*k); cout<<fak(x+k-1) / (fak(x)*fak(k-1)); return 0; }
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