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- /* Se citeste o suma S, iar apoi n bancnote de valori distincte. Sa se afiseze toate
- modurile de a plati suma S cu valorile bancnotelor.*/
- #include <iostream>
- using namespace std;
- int st[50], n, S1, v[100], S;
- void citire()
- {
- int i;
- for(i = 1; i <= n; i++)
- {
- cout << "v[" << i << "]=";
- cin >> v[i];
- }
- }
- int valid(int k)
- {
- int i;
- S1 = 0;
- if(k >= 2 && st[k-1] > st[k])
- return 0;
- for(i = 1; i <= k; i++)
- S1 = S1 + v[st[i]];
- if(S1 > S)
- return 0;
- return 1;
- }
- void afisare(int k)
- {
- int i;
- cout << endl;
- for(i = 1; i < k; i++)
- cout << v[st[i]] << "+";
- cout << v[st[k]];
- }
- void back(int k)
- {
- int i;
- for(i = 1; i <= n; i++)
- {
- st[k] = i;
- if(valid(k))
- {
- if(S1 == S)
- afisare(k);
- else back(k+1);
- }
- }
- }
- int main()
- {
- cout << "n=";
- cin >> n;
- cout << "S=";
- cin >> S;
- citire();
- back(1);
- return 0;
- }
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