oj.uz

Submission #417396

# Submission time Handle Problem Language Result Execution time Memory
417396 2021-06-03T16:16:45 Z lyc Event Hopping 2 (JOI21_event2) C++14
100 / 100
 214 ms 22904 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define TRACE(x) cerr << #x << " :: " << x << endl
#define _ << " " <<
#define SZ(x) ((int)(x).size())
#define ALL(x) (x).begin(), (x).end()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for(int i=(a);i>=(b);--i)
typedef long long ll;
typedef pair<int,int> ii;
 
const int mxN = 1e5+5;
const int mxK = 1e5+5;
 
int N, K;
struct Event { int L, R; } events[mxN];
int nxt[2*mxN][18];
vector<int> vals, ans;
 
int solve(int l, int r) {
    l = max(l,0);
    int ret = 0;
    RFOR(i,17,0){
        if (nxt[l][i] <= r) {
            ret += (1<<i);
            l = nxt[l][i];
        }
    }
    return ret;
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
 
    cin >> N >> K;

    FOR(i,1,N){
        int L, R; cin >> L >> R;
        events[i] = {L,R};
        vals.push_back(L);
        vals.push_back(R);
    }

    sort(ALL(vals));
    vals.resize(unique(ALL(vals))-vals.begin());
    int V = SZ(vals);

    FOR(i,0,V) nxt[i][0] = V+1;
    FOR(i,0,17) nxt[V+1][i] = V+1;

    FOR(i,1,N){
        events[i].L = lower_bound(ALL(vals), events[i].L) - vals.begin();
        events[i].R = lower_bound(ALL(vals), events[i].R) - vals.begin();
        nxt[events[i].L][0] = min(nxt[events[i].L][0], events[i].R);
    }
    
    RFOR(i,V-1,0){
        nxt[i][0] = min(nxt[i][0], nxt[i+1][0]);
        FOR(k,1,17){
            nxt[i][k] = nxt[nxt[i][k-1]][k-1];
        }
    }

    //FOR(i,0,V-1){
    //    cout << nxt[i][0] << ' ';
    //}
    //cout << endl;
 
    set<ii> cur;
    cur.insert(ii(-1,-1));
    cur.insert(ii(V,V));
    int take = solve(0,V-1);
    FOR(i,1,N){
        auto& e = events[i];
        auto it = cur.lower_bound(ii(e.L, 0));
        //TRACE(i _ e.L _ e.R _ it->first _ it->second _ take);
        if (e.R > it->first) continue;
        if (prev(it)->second > e.L) continue;
 
        int take2 = take;
        take2 -= solve(prev(it)->second, it->first);
        take2 += solve(prev(it)->second, e.L);
        take2 += solve(e.R, it->first);
        take2 += 1;

        //TRACE(i _ take2);
        if (take2 >= K) {
            cur.insert(ii(e.L,e.R));
            take = take2;
            ans.push_back(i);
        }
 
        if (SZ(ans) == K) break;
    }
 
    if (SZ(ans) < K) {
        cout << -1 << '\n';
    } else {
        for (int& i : ans) {
            cout << i << '\n';
        }
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 128 ms 22020 KB Output is correct
5 Correct 127 ms 22724 KB Output is correct
6 Correct 122 ms 22336 KB Output is correct
7 Correct 117 ms 21740 KB Output is correct
8 Correct 129 ms 22848 KB Output is correct
9 Correct 128 ms 22632 KB Output is correct
10 Correct 124 ms 22340 KB Output is correct
11 Correct 117 ms 21764 KB Output is correct
12 Correct 115 ms 20856 KB Output is correct
13 Correct 113 ms 20704 KB Output is correct
14 Correct 109 ms 20588 KB Output is correct
15 Correct 108 ms 20208 KB Output is correct
16 Correct 78 ms 18268 KB Output is correct
17 Correct 80 ms 18188 KB Output is correct
18 Correct 77 ms 18112 KB Output is correct
19 Correct 71 ms 17656 KB Output is correct
20 Correct 71 ms 17752 KB Output is correct
21 Correct 73 ms 17740 KB Output is correct
22 Correct 78 ms 17728 KB Output is correct
23 Correct 74 ms 17728 KB Output is correct
24 Correct 74 ms 17660 KB Output is correct
25 Correct 75 ms 17656 KB Output is correct
26 Correct 75 ms 17656 KB Output is correct
27 Correct 75 ms 17760 KB Output is correct
28 Correct 84 ms 17724 KB Output is correct
29 Correct 90 ms 17728 KB Output is correct
30 Correct 82 ms 17760 KB Output is correct
31 Correct 81 ms 17660 KB Output is correct
32 Correct 85 ms 17724 KB Output is correct
33 Correct 90 ms 17652 KB Output is correct
34 Correct 96 ms 19512 KB Output is correct
35 Correct 86 ms 18924 KB Output is correct
36 Correct 74 ms 18164 KB Output is correct
37 Correct 104 ms 20368 KB Output is correct
38 Correct 104 ms 20360 KB Output is correct
39 Correct 101 ms 20196 KB Output is correct
40 Correct 102 ms 20104 KB Output is correct
41 Correct 99 ms 19900 KB Output is correct
42 Correct 100 ms 17740 KB Output is correct
43 Correct 113 ms 20264 KB Output is correct
44 Correct 113 ms 20240 KB Output is correct
45 Correct 109 ms 20028 KB Output is correct
46 Correct 109 ms 19908 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 264 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 1 ms 320 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 2 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 0 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 264 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 320 KB Output is correct
16 Correct 1 ms 320 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 2 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 0 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 3 ms 844 KB Output is correct
29 Correct 3 ms 844 KB Output is correct
30 Correct 3 ms 844 KB Output is correct
31 Correct 4 ms 844 KB Output is correct
32 Correct 3 ms 844 KB Output is correct
33 Correct 3 ms 892 KB Output is correct
34 Correct 3 ms 844 KB Output is correct
35 Correct 6 ms 1032 KB Output is correct
36 Correct 4 ms 972 KB Output is correct
37 Correct 4 ms 972 KB Output is correct
38 Correct 5 ms 844 KB Output is correct
39 Correct 4 ms 972 KB Output is correct
40 Correct 4 ms 972 KB Output is correct
41 Correct 4 ms 972 KB Output is correct
42 Correct 4 ms 844 KB Output is correct
43 Correct 4 ms 844 KB Output is correct
44 Correct 3 ms 844 KB Output is correct
45 Correct 3 ms 844 KB Output is correct
46 Correct 4 ms 844 KB Output is correct
47 Correct 3 ms 844 KB Output is correct
48 Correct 3 ms 844 KB Output is correct
49 Correct 4 ms 844 KB Output is correct
50 Correct 4 ms 852 KB Output is correct
51 Correct 3 ms 844 KB Output is correct
52 Correct 3 ms 844 KB Output is correct
53 Correct 3 ms 848 KB Output is correct
54 Correct 3 ms 844 KB Output is correct
55 Correct 4 ms 720 KB Output is correct
56 Correct 4 ms 716 KB Output is correct
57 Correct 4 ms 716 KB Output is correct
58 Correct 4 ms 716 KB Output is correct
59 Correct 3 ms 716 KB Output is correct
60 Correct 3 ms 716 KB Output is correct
61 Correct 4 ms 716 KB Output is correct
62 Correct 3 ms 716 KB Output is correct
63 Correct 3 ms 784 KB Output is correct
64 Correct 3 ms 588 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 128 ms 22020 KB Output is correct
5 Correct 127 ms 22724 KB Output is correct
6 Correct 122 ms 22336 KB Output is correct
7 Correct 117 ms 21740 KB Output is correct
8 Correct 129 ms 22848 KB Output is correct
9 Correct 128 ms 22632 KB Output is correct
10 Correct 124 ms 22340 KB Output is correct
11 Correct 117 ms 21764 KB Output is correct
12 Correct 115 ms 20856 KB Output is correct
13 Correct 113 ms 20704 KB Output is correct
14 Correct 109 ms 20588 KB Output is correct
15 Correct 108 ms 20208 KB Output is correct
16 Correct 78 ms 18268 KB Output is correct
17 Correct 80 ms 18188 KB Output is correct
18 Correct 77 ms 18112 KB Output is correct
19 Correct 71 ms 17656 KB Output is correct
20 Correct 71 ms 17752 KB Output is correct
21 Correct 73 ms 17740 KB Output is correct
22 Correct 78 ms 17728 KB Output is correct
23 Correct 74 ms 17728 KB Output is correct
24 Correct 74 ms 17660 KB Output is correct
25 Correct 75 ms 17656 KB Output is correct
26 Correct 75 ms 17656 KB Output is correct
27 Correct 75 ms 17760 KB Output is correct
28 Correct 84 ms 17724 KB Output is correct
29 Correct 90 ms 17728 KB Output is correct
30 Correct 82 ms 17760 KB Output is correct
31 Correct 81 ms 17660 KB Output is correct
32 Correct 85 ms 17724 KB Output is correct
33 Correct 90 ms 17652 KB Output is correct
34 Correct 96 ms 19512 KB Output is correct
35 Correct 86 ms 18924 KB Output is correct
36 Correct 74 ms 18164 KB Output is correct
37 Correct 104 ms 20368 KB Output is correct
38 Correct 104 ms 20360 KB Output is correct
39 Correct 101 ms 20196 KB Output is correct
40 Correct 102 ms 20104 KB Output is correct
41 Correct 99 ms 19900 KB Output is correct
42 Correct 100 ms 17740 KB Output is correct
43 Correct 113 ms 20264 KB Output is correct
44 Correct 113 ms 20240 KB Output is correct
45 Correct 109 ms 20028 KB Output is correct
46 Correct 109 ms 19908 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 204 KB Output is correct
50 Correct 1 ms 316 KB Output is correct
51 Correct 1 ms 332 KB Output is correct
52 Correct 1 ms 332 KB Output is correct
53 Correct 1 ms 204 KB Output is correct
54 Correct 1 ms 264 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 1 ms 332 KB Output is correct
60 Correct 1 ms 312 KB Output is correct
61 Correct 1 ms 320 KB Output is correct
62 Correct 1 ms 320 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 2 ms 204 KB Output is correct
66 Correct 1 ms 332 KB Output is correct
67 Correct 1 ms 204 KB Output is correct
68 Correct 0 ms 332 KB Output is correct
69 Correct 1 ms 332 KB Output is correct
70 Correct 0 ms 204 KB Output is correct
71 Correct 1 ms 204 KB Output is correct
72 Correct 1 ms 204 KB Output is correct
73 Correct 1 ms 204 KB Output is correct
74 Correct 3 ms 844 KB Output is correct
75 Correct 3 ms 844 KB Output is correct
76 Correct 3 ms 844 KB Output is correct
77 Correct 4 ms 844 KB Output is correct
78 Correct 3 ms 844 KB Output is correct
79 Correct 3 ms 892 KB Output is correct
80 Correct 3 ms 844 KB Output is correct
81 Correct 6 ms 1032 KB Output is correct
82 Correct 4 ms 972 KB Output is correct
83 Correct 4 ms 972 KB Output is correct
84 Correct 5 ms 844 KB Output is correct
85 Correct 4 ms 972 KB Output is correct
86 Correct 4 ms 972 KB Output is correct
87 Correct 4 ms 972 KB Output is correct
88 Correct 4 ms 844 KB Output is correct
89 Correct 4 ms 844 KB Output is correct
90 Correct 3 ms 844 KB Output is correct
91 Correct 3 ms 844 KB Output is correct
92 Correct 4 ms 844 KB Output is correct
93 Correct 3 ms 844 KB Output is correct
94 Correct 3 ms 844 KB Output is correct
95 Correct 4 ms 844 KB Output is correct
96 Correct 4 ms 852 KB Output is correct
97 Correct 3 ms 844 KB Output is correct
98 Correct 3 ms 844 KB Output is correct
99 Correct 3 ms 848 KB Output is correct
100 Correct 3 ms 844 KB Output is correct
101 Correct 4 ms 720 KB Output is correct
102 Correct 4 ms 716 KB Output is correct
103 Correct 4 ms 716 KB Output is correct
104 Correct 4 ms 716 KB Output is correct
105 Correct 3 ms 716 KB Output is correct
106 Correct 3 ms 716 KB Output is correct
107 Correct 4 ms 716 KB Output is correct
108 Correct 3 ms 716 KB Output is correct
109 Correct 3 ms 784 KB Output is correct
110 Correct 3 ms 588 KB Output is correct
111 Correct 105 ms 17752 KB Output is correct
112 Correct 114 ms 17668 KB Output is correct
113 Correct 103 ms 17728 KB Output is correct
114 Correct 103 ms 17756 KB Output is correct
115 Correct 101 ms 17760 KB Output is correct
116 Correct 124 ms 17656 KB Output is correct
117 Correct 125 ms 17724 KB Output is correct
118 Correct 214 ms 22904 KB Output is correct
119 Correct 199 ms 22272 KB Output is correct
120 Correct 158 ms 20168 KB Output is correct
121 Correct 162 ms 17696 KB Output is correct
122 Correct 195 ms 20800 KB Output is correct
123 Correct 165 ms 20440 KB Output is correct
124 Correct 167 ms 20140 KB Output is correct
125 Correct 149 ms 17668 KB Output is correct
126 Correct 136 ms 18236 KB Output is correct
127 Correct 117 ms 18208 KB Output is correct
128 Correct 118 ms 18144 KB Output is correct
129 Correct 155 ms 17668 KB Output is correct
130 Correct 105 ms 17728 KB Output is correct
131 Correct 105 ms 17756 KB Output is correct
132 Correct 106 ms 17724 KB Output is correct
133 Correct 128 ms 17748 KB Output is correct
134 Correct 104 ms 17728 KB Output is correct
135 Correct 99 ms 17656 KB Output is correct
136 Correct 98 ms 17752 KB Output is correct
137 Correct 121 ms 17724 KB Output is correct
138 Correct 103 ms 17760 KB Output is correct
139 Correct 97 ms 17832 KB Output is correct
140 Correct 96 ms 17728 KB Output is correct
141 Correct 115 ms 17760 KB Output is correct
142 Correct 116 ms 16164 KB Output is correct
143 Correct 117 ms 16192 KB Output is correct
144 Correct 115 ms 16276 KB Output is correct
145 Correct 103 ms 16188 KB Output is correct
146 Correct 105 ms 16172 KB Output is correct
147 Correct 98 ms 15968 KB Output is correct
148 Correct 96 ms 15848 KB Output is correct
149 Correct 99 ms 15732 KB Output is correct
150 Correct 100 ms 15864 KB Output is correct
151 Correct 90 ms 15068 KB Output is correct
152 Correct 71 ms 10716 KB Output is correct
153 Correct 100 ms 16216 KB Output is correct
154 Correct 101 ms 16156 KB Output is correct
155 Correct 101 ms 15904 KB Output is correct
156 Correct 99 ms 15764 KB Output is correct
157 Correct 98 ms 15676 KB Output is correct
158 Correct 96 ms 15568 KB Output is correct
159 Correct 90 ms 14908 KB Output is correct
160 Correct 69 ms 10560 KB Output is correct
161 Correct 145 ms 16832 KB Output is correct
162 Correct 141 ms 16480 KB Output is correct
163 Correct 132 ms 16524 KB Output is correct
164 Correct 133 ms 16312 KB Output is correct
165 Correct 128 ms 16248 KB Output is correct
166 Correct 89 ms 17472 KB Output is correct
167 Correct 106 ms 20068 KB Output is correct
168 Correct 107 ms 19968 KB Output is correct
169 Correct 111 ms 19824 KB Output is correct
170 Correct 101 ms 19744 KB Output is correct
171 Correct 99 ms 20032 KB Output is correct
172 Correct 105 ms 20212 KB Output is correct
173 Correct 136 ms 13120 KB Output is correct
174 Correct 142 ms 13072 KB Output is correct
175 Correct 136 ms 13116 KB Output is correct
176 Correct 120 ms 12520 KB Output is correct