#include <bits/stdc++.h> using namespace std; void solve() { int n, k; cin >> n >> k; vector<int> a(n); vector<int> ans; ans.reserve(k - 1); for (int i = 0; i < n; i++) cin >> a[i]; int flip = 0; for (int i = 1; i < n; i++) if (a[i] <= a[i - 1]) flip = i; if (!flip) goto bad; if (k >= 4) { // flip - 1 is >= flip // we'll take flip - 2, flip - 1, flip k--; int expecteds = 1; if (flip - 1 > 0) expecteds++; if (flip + 1 < n) expecteds++;; // if (flip != n - 1) k--; for (int i = 1; i < flip - 1; i++) { if (k <= expecteds) break; k--; ans.push_back(i); } if (flip - 1 > 0) { ans.push_back(flip - 1); k--; } ans.push_back(flip); k--; if (flip + 1 < n) { ans.push_back(flip + 1); k--; } for (int i = flip + 2; i < n; i++) { if (!k) break; k--; ans.push_back(i); } goto ok; } if (k == 3) { int mn = a[0], mx = a[0]; int mni = 0, mxi = 0; for (int i = 0; i < n; i++) { int v = a[i]; if (v <= mn) { mn = v; mni = i; } if (v >= mx) { if (v > mx) { mxi = i; } mx = v; mxi = min(mxi, i); } } // cerr << mni << ' ' << mxi << endl; if (mni == 0 && mxi == n - 1) goto bad; if (mni != 0) { if (mni < n - 1) { ans = {mni, mni + 1}; } else { ans = {1, mni}; } goto ok; } else { if (mxi != 0) { ans = {mxi, mxi + 1}; } else { ans = {1, 2}; } goto ok; } } if (k == 2) { vector<int> mini(n), maxi(n); mini[0] = a[0]; for (int i = 1; i < n; i++) mini[i] = min(mini[i - 1], a[i]); int mx = a[n - 1]; for (int i = n - 1; i > 0; i--) { mx = max(mx, a[i]); if (mx <= mini[i - 1]) { ans = {i}; goto ok; } } goto bad; // multiset<int> left, right; // for (int i = 0; i < n; i++) { // right.insert(a[i]); // } // for (int i = 0; i < n - 1; i++) { // right.erase(right.find(a[i])); // left.insert(a[i]); // if (*left.begin() >= *right.rbegin()) { // ans.push_back(i + 1); // goto ok; // } // } // goto bad; } ok: cout << "TAK" << endl; for (int v : ans) cout << v << ' '; cout << endl; return; bad: cout << "NIE" << endl; } int main() { ios_base::sync_with_stdio(false); cin.tie(0); // #ifdef LOCAL // int t; cin >> t; while (t--) // #endif solve(); cout.flush(); }
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | #include <bits/stdc++.h> using namespace std; void solve() { int n, k; cin >> n >> k; vector<int> a(n); vector<int> ans; ans.reserve(k - 1); for (int i = 0; i < n; i++) cin >> a[i]; int flip = 0; for (int i = 1; i < n; i++) if (a[i] <= a[i - 1]) flip = i; if (!flip) goto bad; if (k >= 4) { // flip - 1 is >= flip // we'll take flip - 2, flip - 1, flip k--; int expecteds = 1; if (flip - 1 > 0) expecteds++; if (flip + 1 < n) expecteds++;; // if (flip != n - 1) k--; for (int i = 1; i < flip - 1; i++) { if (k <= expecteds) break; k--; ans.push_back(i); } if (flip - 1 > 0) { ans.push_back(flip - 1); k--; } ans.push_back(flip); k--; if (flip + 1 < n) { ans.push_back(flip + 1); k--; } for (int i = flip + 2; i < n; i++) { if (!k) break; k--; ans.push_back(i); } goto ok; } if (k == 3) { int mn = a[0], mx = a[0]; int mni = 0, mxi = 0; for (int i = 0; i < n; i++) { int v = a[i]; if (v <= mn) { mn = v; mni = i; } if (v >= mx) { if (v > mx) { mxi = i; } mx = v; mxi = min(mxi, i); } } // cerr << mni << ' ' << mxi << endl; if (mni == 0 && mxi == n - 1) goto bad; if (mni != 0) { if (mni < n - 1) { ans = {mni, mni + 1}; } else { ans = {1, mni}; } goto ok; } else { if (mxi != 0) { ans = {mxi, mxi + 1}; } else { ans = {1, 2}; } goto ok; } } if (k == 2) { vector<int> mini(n), maxi(n); mini[0] = a[0]; for (int i = 1; i < n; i++) mini[i] = min(mini[i - 1], a[i]); int mx = a[n - 1]; for (int i = n - 1; i > 0; i--) { mx = max(mx, a[i]); if (mx <= mini[i - 1]) { ans = {i}; goto ok; } } goto bad; // multiset<int> left, right; // for (int i = 0; i < n; i++) { // right.insert(a[i]); // } // for (int i = 0; i < n - 1; i++) { // right.erase(right.find(a[i])); // left.insert(a[i]); // if (*left.begin() >= *right.rbegin()) { // ans.push_back(i + 1); // goto ok; // } // } // goto bad; } ok: cout << "TAK" << endl; for (int v : ans) cout << v << ' '; cout << endl; return; bad: cout << "NIE" << endl; } int main() { ios_base::sync_with_stdio(false); cin.tie(0); // #ifdef LOCAL // int t; cin >> t; while (t--) // #endif solve(); cout.flush(); } |