oj.uz

Submission #589652

# Submission time Handle Problem Language Result Execution time Memory
589652 2022-07-05T05:09:46 Z Peti Event Hopping 2 (JOI21_event2) C++14
100 / 100
 196 ms 18868 KB 
#include <bits/stdc++.h>

using namespace std;

struct inter{
    int l, r, ind;
    bool operator<(const inter &in) const{
        if(l != in.l) return l < in.l;
        return r < in.r;
    }
};

const int logn = 20;

void calc(vector<vector<int>> &st, int n){
    for(int i = 1; i < logn; i++){
        for(int j = 0; j < n; j++){
            if(st[i-1][j] > -1 && st[i-1][j] < n) st[i][j] = st[i-1][st[i-1][j]];
            else st[i][j] = st[i-1][j];
        }
    }
}

int get(vector<inter> &v, vector<vector<int>> &st, int n, int x, int r){
    int ret = 0;
    for(int i = logn-1; i >= 0 && x > -1 && x < n; i--){
        //cout<<x<<' '<<i<<' '<<st[i][x]<<'\n';
        if(st[i][x] < n && v[st[i][x]].r <= r){
            ret += (1<<i);
            x = st[i][x];
        }
    }
    return ret;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, k;
    cin>>n>>k;

    vector<inter> v(n);
    for(int i = 0; i < n; i++){
        cin>>v[i].l>>v[i].r;
        v[i].ind = i;
    }
    v.push_back({-2, -1, n});
    n++;

    vector<int> utan(n);
    priority_queue<pair<int, int>> pq;
    sort(v.begin(), v.end(), [](inter a, inter b) -> bool{ return a.r > b.r; });
    int last = -1;
    for(int i = 0; i < n; i++){
        pq.push({v[i].l, i});
        while(!pq.empty() && pq.top().first >= v[i].r){
            if(last == -1 || v[last].r > v[pq.top().second].r) last = pq.top().second;
            pq.pop();
        }
        utan[v[i].ind] = last != -1 ? v[last].ind : n;
    }

    sort(v.begin(), v.end(), [](inter a, inter b) -> bool{ return a.ind < b.ind; });

    /*cout<<"elott: \n";
    for(int i = 0; i < n; i++) cout<<i<<' '<<elott[i]<<'\n';
    cout<<"utan: \n";
    for(int i =0; i < n; i++) cout<<i<<' '<<utan[i]<<'\n';*/

    vector<vector<int>> stutan(logn, vector<int>(n));
    stutan[0] = utan;

    calc(stutan, n);

    /*cout<<"stutan: ";
    for(int i = 0; i < n; i++) cout<<stutan[1][i]<<' ';
    cout<<'\n';*/

    set<inter> s;
    s.insert({-2, -1, n-1});
    s.insert({(int)1e9+1, (int)1e9+1, -1});
    vector<int> ki;

    int maxdb = get(v, stutan, n, n-1, (int)1e9+1);

    if(maxdb < k){
        cout<<-1<<'\n';
        return 0;
    }

    //for(int i = 0; i < logn; i++) cout<<stutan[i][n-1]<<'\n';

    for(int i = 0; i < n-1 && ki.size() < k; i++){
        auto it = s.lower_bound(v[i]);
        if(prev(it)->r > v[i].l || v[i].r > it->l) continue;

        int tmp = get(v, stutan, n, prev(it)->ind, it->l);
        int db = get(v, stutan, n, prev(it)->ind, v[i].l) + get(v, stutan, n, i, it->l);

        //cout<<i<<" | "<<tmp<<' '<<db<<' '<<maxdb<<' '<<ki.size()<<" | "<<prev(it)->ind<<'\n';

        if((int)ki.size() + maxdb - tmp + db + 1 >= k){
            ki.push_back(i+1);
            s.insert(v[i]);
            maxdb -= tmp - db;
            //cout<<"berak\n";
            //cout<<"uj: "<<maxdb<<'\n';
        }
    }

    if(ki.size() < k){
        cout<<-1<<'\n';
    } else{
        for(int x : ki) cout<<x<<'\n';
    }

    return 0;
}

/*
5 4
1 3
2 5
8 9
6 8
10 15


10 6
1 2
2 3
2 4
4 5
4 6
6 7
7 8
8 9
9 10
10 11
*/

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:94:41: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   94 |     for(int i = 0; i < n-1 && ki.size() < k; i++){
      |                               ~~~~~~~~~~^~~
event2.cpp:112:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  112 |     if(ki.size() < k){
      |        ~~~~~~~~~~^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 320 KB Output is correct
4 Correct 121 ms 17972 KB Output is correct
5 Correct 114 ms 17976 KB Output is correct
6 Correct 119 ms 17580 KB Output is correct
7 Correct 134 ms 17092 KB Output is correct
8 Correct 127 ms 18328 KB Output is correct
9 Correct 110 ms 17920 KB Output is correct
10 Correct 113 ms 17704 KB Output is correct
11 Correct 106 ms 17084 KB Output is correct
12 Correct 87 ms 15840 KB Output is correct
13 Correct 82 ms 15524 KB Output is correct
14 Correct 76 ms 15332 KB Output is correct
15 Correct 80 ms 14888 KB Output is correct
16 Correct 55 ms 12540 KB Output is correct
17 Correct 52 ms 12488 KB Output is correct
18 Correct 49 ms 12348 KB Output is correct
19 Correct 44 ms 11944 KB Output is correct
20 Correct 55 ms 11952 KB Output is correct
21 Correct 53 ms 11944 KB Output is correct
22 Correct 55 ms 12056 KB Output is correct
23 Correct 50 ms 11944 KB Output is correct
24 Correct 53 ms 11952 KB Output is correct
25 Correct 48 ms 12208 KB Output is correct
26 Correct 48 ms 12204 KB Output is correct
27 Correct 51 ms 12208 KB Output is correct
28 Correct 50 ms 12008 KB Output is correct
29 Correct 35 ms 11960 KB Output is correct
30 Correct 34 ms 11960 KB Output is correct
31 Correct 39 ms 12008 KB Output is correct
32 Correct 45 ms 11956 KB Output is correct
33 Correct 47 ms 12196 KB Output is correct
34 Correct 67 ms 14128 KB Output is correct
35 Correct 51 ms 13220 KB Output is correct
36 Correct 39 ms 12468 KB Output is correct
37 Correct 74 ms 15216 KB Output is correct
38 Correct 70 ms 15012 KB Output is correct
39 Correct 69 ms 14896 KB Output is correct
40 Correct 70 ms 14772 KB Output is correct
41 Correct 79 ms 14664 KB Output is correct
42 Correct 41 ms 12004 KB Output is correct
43 Correct 85 ms 15088 KB Output is correct
44 Correct 87 ms 14892 KB Output is correct
45 Correct 75 ms 14760 KB Output is correct
46 Correct 72 ms 14600 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 316 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 316 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 2 ms 596 KB Output is correct
31 Correct 2 ms 596 KB Output is correct
32 Correct 2 ms 596 KB Output is correct
33 Correct 2 ms 596 KB Output is correct
34 Correct 2 ms 596 KB Output is correct
35 Correct 4 ms 852 KB Output is correct
36 Correct 4 ms 840 KB Output is correct
37 Correct 3 ms 724 KB Output is correct
38 Correct 3 ms 596 KB Output is correct
39 Correct 4 ms 848 KB Output is correct
40 Correct 3 ms 724 KB Output is correct
41 Correct 4 ms 724 KB Output is correct
42 Correct 2 ms 596 KB Output is correct
43 Correct 2 ms 672 KB Output is correct
44 Correct 2 ms 724 KB Output is correct
45 Correct 2 ms 724 KB Output is correct
46 Correct 2 ms 588 KB Output is correct
47 Correct 3 ms 596 KB Output is correct
48 Correct 2 ms 596 KB Output is correct
49 Correct 2 ms 596 KB Output is correct
50 Correct 2 ms 596 KB Output is correct
51 Correct 2 ms 668 KB Output is correct
52 Correct 2 ms 596 KB Output is correct
53 Correct 2 ms 592 KB Output is correct
54 Correct 2 ms 596 KB Output is correct
55 Correct 4 ms 844 KB Output is correct
56 Correct 3 ms 840 KB Output is correct
57 Correct 3 ms 852 KB Output is correct
58 Correct 3 ms 840 KB Output is correct
59 Correct 3 ms 852 KB Output is correct
60 Correct 3 ms 840 KB Output is correct
61 Correct 4 ms 804 KB Output is correct
62 Correct 3 ms 852 KB Output is correct
63 Correct 3 ms 832 KB Output is correct
64 Correct 2 ms 596 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 320 KB Output is correct
4 Correct 121 ms 17972 KB Output is correct
5 Correct 114 ms 17976 KB Output is correct
6 Correct 119 ms 17580 KB Output is correct
7 Correct 134 ms 17092 KB Output is correct
8 Correct 127 ms 18328 KB Output is correct
9 Correct 110 ms 17920 KB Output is correct
10 Correct 113 ms 17704 KB Output is correct
11 Correct 106 ms 17084 KB Output is correct
12 Correct 87 ms 15840 KB Output is correct
13 Correct 82 ms 15524 KB Output is correct
14 Correct 76 ms 15332 KB Output is correct
15 Correct 80 ms 14888 KB Output is correct
16 Correct 55 ms 12540 KB Output is correct
17 Correct 52 ms 12488 KB Output is correct
18 Correct 49 ms 12348 KB Output is correct
19 Correct 44 ms 11944 KB Output is correct
20 Correct 55 ms 11952 KB Output is correct
21 Correct 53 ms 11944 KB Output is correct
22 Correct 55 ms 12056 KB Output is correct
23 Correct 50 ms 11944 KB Output is correct
24 Correct 53 ms 11952 KB Output is correct
25 Correct 48 ms 12208 KB Output is correct
26 Correct 48 ms 12204 KB Output is correct
27 Correct 51 ms 12208 KB Output is correct
28 Correct 50 ms 12008 KB Output is correct
29 Correct 35 ms 11960 KB Output is correct
30 Correct 34 ms 11960 KB Output is correct
31 Correct 39 ms 12008 KB Output is correct
32 Correct 45 ms 11956 KB Output is correct
33 Correct 47 ms 12196 KB Output is correct
34 Correct 67 ms 14128 KB Output is correct
35 Correct 51 ms 13220 KB Output is correct
36 Correct 39 ms 12468 KB Output is correct
37 Correct 74 ms 15216 KB Output is correct
38 Correct 70 ms 15012 KB Output is correct
39 Correct 69 ms 14896 KB Output is correct
40 Correct 70 ms 14772 KB Output is correct
41 Correct 79 ms 14664 KB Output is correct
42 Correct 41 ms 12004 KB Output is correct
43 Correct 85 ms 15088 KB Output is correct
44 Correct 87 ms 14892 KB Output is correct
45 Correct 75 ms 14760 KB Output is correct
46 Correct 72 ms 14600 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 324 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 0 ms 212 KB Output is correct
57 Correct 1 ms 320 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 1 ms 212 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 0 ms 212 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 0 ms 212 KB Output is correct
68 Correct 0 ms 212 KB Output is correct
69 Correct 0 ms 212 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 0 ms 212 KB Output is correct
72 Correct 1 ms 212 KB Output is correct
73 Correct 1 ms 316 KB Output is correct
74 Correct 2 ms 596 KB Output is correct
75 Correct 2 ms 596 KB Output is correct
76 Correct 2 ms 596 KB Output is correct
77 Correct 2 ms 596 KB Output is correct
78 Correct 2 ms 596 KB Output is correct
79 Correct 2 ms 596 KB Output is correct
80 Correct 2 ms 596 KB Output is correct
81 Correct 4 ms 852 KB Output is correct
82 Correct 4 ms 840 KB Output is correct
83 Correct 3 ms 724 KB Output is correct
84 Correct 3 ms 596 KB Output is correct
85 Correct 4 ms 848 KB Output is correct
86 Correct 3 ms 724 KB Output is correct
87 Correct 4 ms 724 KB Output is correct
88 Correct 2 ms 596 KB Output is correct
89 Correct 2 ms 672 KB Output is correct
90 Correct 2 ms 724 KB Output is correct
91 Correct 2 ms 724 KB Output is correct
92 Correct 2 ms 588 KB Output is correct
93 Correct 3 ms 596 KB Output is correct
94 Correct 2 ms 596 KB Output is correct
95 Correct 2 ms 596 KB Output is correct
96 Correct 2 ms 596 KB Output is correct
97 Correct 2 ms 668 KB Output is correct
98 Correct 2 ms 596 KB Output is correct
99 Correct 2 ms 592 KB Output is correct
100 Correct 2 ms 596 KB Output is correct
101 Correct 4 ms 844 KB Output is correct
102 Correct 3 ms 840 KB Output is correct
103 Correct 3 ms 852 KB Output is correct
104 Correct 3 ms 840 KB Output is correct
105 Correct 3 ms 852 KB Output is correct
106 Correct 3 ms 840 KB Output is correct
107 Correct 4 ms 804 KB Output is correct
108 Correct 3 ms 852 KB Output is correct
109 Correct 3 ms 832 KB Output is correct
110 Correct 2 ms 596 KB Output is correct
111 Correct 60 ms 12460 KB Output is correct
112 Correct 62 ms 12536 KB Output is correct
113 Correct 61 ms 12540 KB Output is correct
114 Correct 57 ms 12560 KB Output is correct
115 Correct 55 ms 12472 KB Output is correct
116 Correct 54 ms 12464 KB Output is correct
117 Correct 59 ms 12536 KB Output is correct
118 Correct 196 ms 18416 KB Output is correct
119 Correct 156 ms 17600 KB Output is correct
120 Correct 101 ms 14968 KB Output is correct
121 Correct 50 ms 12016 KB Output is correct
122 Correct 149 ms 15732 KB Output is correct
123 Correct 107 ms 15292 KB Output is correct
124 Correct 100 ms 15084 KB Output is correct
125 Correct 58 ms 12012 KB Output is correct
126 Correct 75 ms 12560 KB Output is correct
127 Correct 70 ms 12364 KB Output is correct
128 Correct 64 ms 12264 KB Output is correct
129 Correct 44 ms 12012 KB Output is correct
130 Correct 63 ms 11952 KB Output is correct
131 Correct 67 ms 12088 KB Output is correct
132 Correct 57 ms 11956 KB Output is correct
133 Correct 48 ms 12016 KB Output is correct
134 Correct 63 ms 12060 KB Output is correct
135 Correct 73 ms 12028 KB Output is correct
136 Correct 53 ms 12160 KB Output is correct
137 Correct 49 ms 12052 KB Output is correct
138 Correct 54 ms 12212 KB Output is correct
139 Correct 56 ms 12248 KB Output is correct
140 Correct 52 ms 12216 KB Output is correct
141 Correct 49 ms 12216 KB Output is correct
142 Correct 121 ms 18868 KB Output is correct
143 Correct 129 ms 18868 KB Output is correct
144 Correct 129 ms 18828 KB Output is correct
145 Correct 112 ms 18776 KB Output is correct
146 Correct 103 ms 18568 KB Output is correct
147 Correct 108 ms 18492 KB Output is correct
148 Correct 118 ms 18352 KB Output is correct
149 Correct 108 ms 18152 KB Output is correct
150 Correct 116 ms 18064 KB Output is correct
151 Correct 99 ms 17340 KB Output is correct
152 Correct 48 ms 11960 KB Output is correct
153 Correct 112 ms 18740 KB Output is correct
154 Correct 104 ms 18704 KB Output is correct
155 Correct 108 ms 18460 KB Output is correct
156 Correct 109 ms 18416 KB Output is correct
157 Correct 125 ms 18192 KB Output is correct
158 Correct 105 ms 18092 KB Output is correct
159 Correct 101 ms 17388 KB Output is correct
160 Correct 50 ms 12012 KB Output is correct
161 Correct 105 ms 15156 KB Output is correct
162 Correct 106 ms 15080 KB Output is correct
163 Correct 90 ms 14908 KB Output is correct
164 Correct 98 ms 14724 KB Output is correct
165 Correct 88 ms 14576 KB Output is correct
166 Correct 36 ms 11948 KB Output is correct
167 Correct 81 ms 15124 KB Output is correct
168 Correct 75 ms 14900 KB Output is correct
169 Correct 77 ms 14764 KB Output is correct
170 Correct 71 ms 14624 KB Output is correct
171 Correct 71 ms 14508 KB Output is correct
172 Correct 76 ms 15216 KB Output is correct
173 Correct 122 ms 15244 KB Output is correct
174 Correct 123 ms 15264 KB Output is correct
175 Correct 108 ms 15080 KB Output is correct
176 Correct 106 ms 14512 KB Output is correct