#define _CRT_SECURE_NO_WARNINGS #include <iostream> using namespace std; int main() { std::ios_base::sync_with_stdio(false); int i, n, k, num; bool spr[500100] = { false }; cin >> n >> k; int time = 0, set = 0; for (i = 0; i < n; i++) { cin >> num; if (spr[num] == false) { time += (i - set); set++; //cout << "i=" << i << " set=" << set << " time=" << time << '\n'; spr[num] = true; if (k == set) { break; } } } if (k != set) { cout << "-1" << '\n'; } else { cout << time << '\n'; } 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 | #define _CRT_SECURE_NO_WARNINGS #include <iostream> using namespace std; int main() { std::ios_base::sync_with_stdio(false); int i, n, k, num; bool spr[500100] = { false }; cin >> n >> k; int time = 0, set = 0; for (i = 0; i < n; i++) { cin >> num; if (spr[num] == false) { time += (i - set); set++; //cout << "i=" << i << " set=" << set << " time=" << time << '\n'; spr[num] = true; if (k == set) { break; } } } if (k != set) { cout << "-1" << '\n'; } else { cout << time << '\n'; } return 0; } |