#include <bits/stdc++.h> using namespace std; #define PB push_back #define LL long long #define int LL #define FOR(i,a,b) for (int i = (a); i <= (b); i++) #define FORD(i,a,b) for (int i = (a); i >= (b); i--) #define REP(i,n) FOR(i,0,(int)(n)-1) #define st first #define nd second #define ALL(x) (x).begin(), (x).end() #define SZ(x) ((int)(x).size()) #define VI vector<int> #define PII pair<int,int> #define LD long double template<class T> ostream &operator<<(ostream &os, vector<T> V){ os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]"; } template<class T, size_t N> ostream &operator<<(ostream &os, array<T, N> V){ os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]"; } template<class L, class R> ostream &operator<<(ostream &os, pair<L,R> P) { return os << "(" << P.st << "," << P.nd << ")"; } template<class C> void mini(C& a4, C b4) { a4 = min(a4, b4); } template<class C> void maxi(C& a4, C b4) { a4 = max(a4, b4); } template<class TH> void _dbg(const char *sdbg, TH h){cerr<<sdbg<<"="<<h<<"\n";} template<class TH, class... TA> void _dbg(const char *sdbg, TH h, TA... a) { while(*sdbg!=',')cerr<<*sdbg++;cerr<<"="<<h<<","; _dbg(sdbg+1, a...); } #ifdef LOCAL #define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__) #else #define debug(...) (__VA_ARGS__) #define cerr if(0)cout #endif optional<vector<int>> solve2(int n, const vector<int> & profits){ // compute prefix minimums and suffix maximums vector<int> prefix_min(n); vector<int> suffix_max(n); prefix_min[0] = profits[0]; suffix_max[n-1] = profits[n-1]; FOR(i,1,n-1){ prefix_min[i] = min(prefix_min[i-1], profits[i]); } FORD(i,n-2,0){ suffix_max[i] = max(suffix_max[i+1], profits[i]); } // find if there is a point where prefix_min[i] > suffix_max[i+1] // if there is, return the point FOR(i,0,n-2){ if(prefix_min[i] >= suffix_max[i+1]){ return vector<int>{i}; } } return {}; } optional<vector<int>> solve3(int n, const vector<int> & profits){ // check if minimum is only at the beginning // and if maximum is only at the end int min_pos = min_element(profits.begin() + 1, profits.end()) - profits.begin(); int max_pos = max_element(profits.begin(), profits.end() - 1) - profits.begin(); if(profits[min_pos] <= profits[0]){ return {{min_pos - 1, min_pos}}; } if(profits[max_pos] >= profits.back()){ if(max_pos == 0){ return {{0, 1}}; } else{ return {{max_pos - 1, max_pos}}; } } return {}; } optional<vector<int>> solve(int n, int k, const vector<int> & profits){ if(k == 2) return solve2(n, profits); if(k == 3){ return solve3(n, profits); } vector<bool> ans(n - 1); for(int i = 0; i < n - 1; i++){ if(profits[i] >= profits[i + 1]){ if(i){ ans[i - 1] = true; } ans[i] = true; ans[i + 1] = true; int cnt = 2; for(int j = 0; j < n - 1 && cnt < k - 1; j++){ if(!ans[j]){ cnt++; ans[j] = true; } } // convert ans array to list of indices vector<int> ans2; REP(i,n-1){ if(ans[i]){ ans2.push_back(i); } } return ans2; } } return {}; } bool check(vector<int> ans, vector<int> profits){ int idx = 0; int cur = 0; ans.push_back(profits.size()); for(int a: ans){ set<int> s; for(;idx < a; idx++){ s.insert(profits[idx]); } auto it = s.upper_bound(cur); if(it == s.end()) return true; cur = *it; } return false; } int32_t main() { default_random_engine gen; ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(11); cerr << fixed << setprecision(6); // read input // n k - integers // a1 a2 ... an - integers int n, k; cin >> n >> k; vector<int> profits(n); for (int i = 0; i < n; i++){ cin >> profits[i]; } auto r = solve(n, k, profits); if(!r.has_value()){ cout << "NIE\n"; } else{ auto rv = r.value(); // assert(rv.size() == k - 1); // assert(check(rv, profits)); cout << "TAK\n"; for(int a: rv){ cout << a + 1 << " "; } cout << "\n"; } }
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | #include <bits/stdc++.h> using namespace std; #define PB push_back #define LL long long #define int LL #define FOR(i,a,b) for (int i = (a); i <= (b); i++) #define FORD(i,a,b) for (int i = (a); i >= (b); i--) #define REP(i,n) FOR(i,0,(int)(n)-1) #define st first #define nd second #define ALL(x) (x).begin(), (x).end() #define SZ(x) ((int)(x).size()) #define VI vector<int> #define PII pair<int,int> #define LD long double template<class T> ostream &operator<<(ostream &os, vector<T> V){ os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]"; } template<class T, size_t N> ostream &operator<<(ostream &os, array<T, N> V){ os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]"; } template<class L, class R> ostream &operator<<(ostream &os, pair<L,R> P) { return os << "(" << P.st << "," << P.nd << ")"; } template<class C> void mini(C& a4, C b4) { a4 = min(a4, b4); } template<class C> void maxi(C& a4, C b4) { a4 = max(a4, b4); } template<class TH> void _dbg(const char *sdbg, TH h){cerr<<sdbg<<"="<<h<<"\n";} template<class TH, class... TA> void _dbg(const char *sdbg, TH h, TA... a) { while(*sdbg!=',')cerr<<*sdbg++;cerr<<"="<<h<<","; _dbg(sdbg+1, a...); } #ifdef LOCAL #define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__) #else #define debug(...) (__VA_ARGS__) #define cerr if(0)cout #endif optional<vector<int>> solve2(int n, const vector<int> & profits){ // compute prefix minimums and suffix maximums vector<int> prefix_min(n); vector<int> suffix_max(n); prefix_min[0] = profits[0]; suffix_max[n-1] = profits[n-1]; FOR(i,1,n-1){ prefix_min[i] = min(prefix_min[i-1], profits[i]); } FORD(i,n-2,0){ suffix_max[i] = max(suffix_max[i+1], profits[i]); } // find if there is a point where prefix_min[i] > suffix_max[i+1] // if there is, return the point FOR(i,0,n-2){ if(prefix_min[i] >= suffix_max[i+1]){ return vector<int>{i}; } } return {}; } optional<vector<int>> solve3(int n, const vector<int> & profits){ // check if minimum is only at the beginning // and if maximum is only at the end int min_pos = min_element(profits.begin() + 1, profits.end()) - profits.begin(); int max_pos = max_element(profits.begin(), profits.end() - 1) - profits.begin(); if(profits[min_pos] <= profits[0]){ return {{min_pos - 1, min_pos}}; } if(profits[max_pos] >= profits.back()){ if(max_pos == 0){ return {{0, 1}}; } else{ return {{max_pos - 1, max_pos}}; } } return {}; } optional<vector<int>> solve(int n, int k, const vector<int> & profits){ if(k == 2) return solve2(n, profits); if(k == 3){ return solve3(n, profits); } vector<bool> ans(n - 1); for(int i = 0; i < n - 1; i++){ if(profits[i] >= profits[i + 1]){ if(i){ ans[i - 1] = true; } ans[i] = true; ans[i + 1] = true; int cnt = 2; for(int j = 0; j < n - 1 && cnt < k - 1; j++){ if(!ans[j]){ cnt++; ans[j] = true; } } // convert ans array to list of indices vector<int> ans2; REP(i,n-1){ if(ans[i]){ ans2.push_back(i); } } return ans2; } } return {}; } bool check(vector<int> ans, vector<int> profits){ int idx = 0; int cur = 0; ans.push_back(profits.size()); for(int a: ans){ set<int> s; for(;idx < a; idx++){ s.insert(profits[idx]); } auto it = s.upper_bound(cur); if(it == s.end()) return true; cur = *it; } return false; } int32_t main() { default_random_engine gen; ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(11); cerr << fixed << setprecision(6); // read input // n k - integers // a1 a2 ... an - integers int n, k; cin >> n >> k; vector<int> profits(n); for (int i = 0; i < n; i++){ cin >> profits[i]; } auto r = solve(n, k, profits); if(!r.has_value()){ cout << "NIE\n"; } else{ auto rv = r.value(); // assert(rv.size() == k - 1); // assert(check(rv, profits)); cout << "TAK\n"; for(int a: rv){ cout << a + 1 << " "; } cout << "\n"; } } |