#include <bits/stdc++.h> using namespace std; // 2 <= k <= n <= 5*10^5 int n, k; vector<int> a, prefMin, sufMax; vector<int> result; void solveCaseTwo() { int tmpMin = a[0]; int tmpMax = a[n - 1]; for (int i = 0; i < n; ++i) { tmpMin = min(tmpMin, a[i]); prefMin.push_back(tmpMin); tmpMax = max(tmpMax, a[n - 1 - i]); sufMax.push_back(tmpMax); } for (int i = 0; i < n - 1; ++i) { if (prefMin[i] >= sufMax[n - 2 - i]) { cout << "TAK" << endl << i + 1; return; } } cout << "NIE"; } void solveCaseThree() { int maxEl = *max_element(a.begin(), a.end()); int minEl = *min_element(a.begin(), a.end()); int firstMax = n, lastMin = -1; for (int i = 0; i < n; ++i) { if (a[i] == maxEl) { if (firstMax == n) { firstMax = i; } } if (a[i] == minEl) { lastMin = i; } } if (minEl < maxEl && firstMax == n - 1 && lastMin == 0) { cout << "NIE"; return; } cout << "TAK\n"; if (minEl == maxEl) { cout << 1 << " " << 2; return; } if (firstMax < n - 1) { cout << firstMax << " " << firstMax + 1; return; } cout << lastMin << " " << lastMin + 1; } void solveCaseFourOrMore() { int inv = -1; for (int i = 0; i < n - 1; ++i) { if (a[i] >= a[i + 1]) { inv = i; break; } } if (inv == -1) { cout << "NIE"; return; } cout << "TAK\n"; int startIdx = max(int(1), inv + 4 - k); for (int i = startIdx; i < k - 2 + startIdx; ++i) { cout << i << " "; } cout << k - 2 + startIdx; } int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cin >> n >> k; for (int i = 0; i < n; ++i) { int tmp; cin >> tmp; a.push_back(tmp); } switch (k) { case 2: solveCaseTwo(); break; case 3: solveCaseThree(); break; default: solveCaseFourOrMore(); break; } 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 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | #include <bits/stdc++.h> using namespace std; // 2 <= k <= n <= 5*10^5 int n, k; vector<int> a, prefMin, sufMax; vector<int> result; void solveCaseTwo() { int tmpMin = a[0]; int tmpMax = a[n - 1]; for (int i = 0; i < n; ++i) { tmpMin = min(tmpMin, a[i]); prefMin.push_back(tmpMin); tmpMax = max(tmpMax, a[n - 1 - i]); sufMax.push_back(tmpMax); } for (int i = 0; i < n - 1; ++i) { if (prefMin[i] >= sufMax[n - 2 - i]) { cout << "TAK" << endl << i + 1; return; } } cout << "NIE"; } void solveCaseThree() { int maxEl = *max_element(a.begin(), a.end()); int minEl = *min_element(a.begin(), a.end()); int firstMax = n, lastMin = -1; for (int i = 0; i < n; ++i) { if (a[i] == maxEl) { if (firstMax == n) { firstMax = i; } } if (a[i] == minEl) { lastMin = i; } } if (minEl < maxEl && firstMax == n - 1 && lastMin == 0) { cout << "NIE"; return; } cout << "TAK\n"; if (minEl == maxEl) { cout << 1 << " " << 2; return; } if (firstMax < n - 1) { cout << firstMax << " " << firstMax + 1; return; } cout << lastMin << " " << lastMin + 1; } void solveCaseFourOrMore() { int inv = -1; for (int i = 0; i < n - 1; ++i) { if (a[i] >= a[i + 1]) { inv = i; break; } } if (inv == -1) { cout << "NIE"; return; } cout << "TAK\n"; int startIdx = max(int(1), inv + 4 - k); for (int i = startIdx; i < k - 2 + startIdx; ++i) { cout << i << " "; } cout << k - 2 + startIdx; } int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cin >> n >> k; for (int i = 0; i < n; ++i) { int tmp; cin >> tmp; a.push_back(tmp); } switch (k) { case 2: solveCaseTwo(); break; case 3: solveCaseThree(); break; default: solveCaseFourOrMore(); break; } return 0; } |