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#include <iostream> #include <vector> #include <map> #include <set> using namespace std; typedef long long ll; int main() { int n; cin >> n; vector<int> cnt(10, 0); while(n > 0) { int cifra = n % 10; cnt[cifra]++; n /= 10; } int res = 0; for(int i = 100; i <= 999; i++) { vector<int> tmp(10, 0); int t = i; while(t > 0) { int cifra = t % 10; tmp[cifra]++; t /= 10; } if(cnt == tmp) { res++; } } cout << res << endl; return 0; } // 2 1 3 3
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