//============================================================================ // Name : 1b-ora.cpp //============================================================================ #include <iostream> #include <set> using namespace std; int main() { ios_base::sync_with_stdio(false); set<int> different; unsigned int n, k, a, moves = 0, result = 0; cin >> n; cin >> k; cin >> a; different.insert(a); for (unsigned int i = 1; i < n; ++i) { cin >> a; if (different.count(a) > 0) { moves++; } else { different.insert(a); result += moves; if (different.size() == k) { break; } } } if (different.size() == k) { cout << result << endl; } else { cout << "-1" << endl; } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | //============================================================================ // Name : 1b-ora.cpp //============================================================================ #include <iostream> #include <set> using namespace std; int main() { ios_base::sync_with_stdio(false); set<int> different; unsigned int n, k, a, moves = 0, result = 0; cin >> n; cin >> k; cin >> a; different.insert(a); for (unsigned int i = 1; i < n; ++i) { cin >> a; if (different.count(a) > 0) { moves++; } else { different.insert(a); result += moves; if (different.size() == k) { break; } } } if (different.size() == k) { cout << result << endl; } else { cout << "-1" << endl; } return 0; } |