oj.uz

답안 #493417

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
493417 2021-12-11T09:12:11 Z Jarif_Rahman Event Hopping 2 (JOI21_event2) C++17
100 / 100
 204 ms 22408 KB 
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
const int inf = 1e9+7;

int n, k;
vector<pair<int, int>> events;
vector<int> succ;
vector<vector<int>> anc;

int count(int nd, int lim){
    if(nd == -1) return 0;
    if(events[nd].sc > lim) return 0;
    for(int i = 17; i >= 0; i--){
        if(anc[nd][i] != n && events[anc[nd][i]].sc <= lim) return count(anc[nd][i], lim)+(1<<i);
    }
    return 1;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> k;
    events.resize(n);
    succ.resize(n, -1);
    for(auto &p: events) cin >> p.f >> p.sc;

    vector<pair<int, int>> sth;
    for(int i = 0; i < n; i++){
        sth.pb({events[i].f, i+1});
        sth.pb({events[i].sc, -i-1});
    }
    sort(sth.begin(), sth.end());

    int mn = inf, cur = -1, start = -1, start_end = inf;
    for(int i = (int)sth.size()-1; i >= 0; i--){
        int in = sth[i].sc;
        if(in < 0){
            in*=-1;
            in--;
            if(events[in].sc == start_end) start = min(start, in);
            else if(events[in].sc < start_end) start_end = events[in].sc, start = in;
            succ[in] = cur;
        }
        else{
            in--;
            if(events[in].sc == mn) cur = min(cur, in);
            else if(events[in].sc < mn) mn = events[in].sc, cur = in;
        }
    }

    anc.resize(n+1, vector<int>(18, n));
    for(int i = 0; i < n; i++) if(succ[i] != -1) anc[i][0] = succ[i];
    for(int p = 1; p < 18; p++) for(int i = 0; i <= n; i++)
        anc[i][p] = anc[anc[i][p-1]][p-1];

    int sum = count(start, inf);
    set<array<int, 4>> ss;
    ss.insert({inf, 0, start, sum});

    vector<int> ans;
    int kk = k;

    for(int i = 0; i < n; i++){
        if(kk == 0) break;
        auto it = ss.lower_bound({events[i].sc, 0, 0, 0});
        if(it == ss.end() || (*it)[1] > events[i].f) continue;
        auto [r, l, st, cnt] = *it;
        int a = count(st, events[i].f);
        int b = count(succ[i], r);
        if(a+b+sum-cnt+1 < kk) continue;
        ans.pb(i);
        sum-=cnt;
        sum+=a+b;
        ss.erase(it);
        ss.insert({events[i].f, l, st, a});
        ss.insert({r, events[i].sc, succ[i], b});
        kk--;
    }

    if(ans.size() != k) cout << "-1\n", exit(0);
    for(int x: ans) cout << x+1 << "\n";
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:85:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   85 |     if(ans.size() != k) cout << "-1\n", exit(0);
      |        ~~~~~~~~~~~^~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 122 ms 20240 KB Output is correct
5 Correct 147 ms 21568 KB Output is correct
6 Correct 112 ms 21180 KB Output is correct
7 Correct 105 ms 20484 KB Output is correct
8 Correct 175 ms 21912 KB Output is correct
9 Correct 111 ms 21504 KB Output is correct
10 Correct 114 ms 21196 KB Output is correct
11 Correct 117 ms 20488 KB Output is correct
12 Correct 98 ms 19280 KB Output is correct
13 Correct 95 ms 19016 KB Output is correct
14 Correct 95 ms 18888 KB Output is correct
15 Correct 85 ms 18496 KB Output is correct
16 Correct 69 ms 16080 KB Output is correct
17 Correct 69 ms 15944 KB Output is correct
18 Correct 69 ms 15816 KB Output is correct
19 Correct 63 ms 15300 KB Output is correct
20 Correct 63 ms 15200 KB Output is correct
21 Correct 55 ms 15160 KB Output is correct
22 Correct 60 ms 15156 KB Output is correct
23 Correct 58 ms 15160 KB Output is correct
24 Correct 56 ms 15116 KB Output is correct
25 Correct 55 ms 15132 KB Output is correct
26 Correct 59 ms 15160 KB Output is correct
27 Correct 80 ms 15160 KB Output is correct
28 Correct 88 ms 15160 KB Output is correct
29 Correct 80 ms 15168 KB Output is correct
30 Correct 83 ms 15176 KB Output is correct
31 Correct 85 ms 15116 KB Output is correct
32 Correct 73 ms 15080 KB Output is correct
33 Correct 70 ms 15172 KB Output is correct
34 Correct 75 ms 17596 KB Output is correct
35 Correct 66 ms 16772 KB Output is correct
36 Correct 57 ms 15932 KB Output is correct
37 Correct 94 ms 18752 KB Output is correct
38 Correct 85 ms 18576 KB Output is correct
39 Correct 91 ms 18500 KB Output is correct
40 Correct 87 ms 18232 KB Output is correct
41 Correct 89 ms 18104 KB Output is correct
42 Correct 92 ms 15160 KB Output is correct
43 Correct 95 ms 18580 KB Output is correct
44 Correct 94 ms 18432 KB Output is correct
45 Correct 111 ms 18248 KB Output is correct
46 Correct 93 ms 18108 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 316 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 308 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 316 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 0 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 316 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 308 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 316 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 0 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 716 KB Output is correct
29 Correct 3 ms 716 KB Output is correct
30 Correct 3 ms 716 KB Output is correct
31 Correct 2 ms 716 KB Output is correct
32 Correct 2 ms 660 KB Output is correct
33 Correct 3 ms 716 KB Output is correct
34 Correct 4 ms 844 KB Output is correct
35 Correct 4 ms 920 KB Output is correct
36 Correct 3 ms 844 KB Output is correct
37 Correct 3 ms 844 KB Output is correct
38 Correct 4 ms 716 KB Output is correct
39 Correct 4 ms 844 KB Output is correct
40 Correct 3 ms 844 KB Output is correct
41 Correct 3 ms 844 KB Output is correct
42 Correct 3 ms 716 KB Output is correct
43 Correct 3 ms 844 KB Output is correct
44 Correct 3 ms 716 KB Output is correct
45 Correct 3 ms 812 KB Output is correct
46 Correct 3 ms 716 KB Output is correct
47 Correct 3 ms 716 KB Output is correct
48 Correct 2 ms 708 KB Output is correct
49 Correct 4 ms 716 KB Output is correct
50 Correct 3 ms 716 KB Output is correct
51 Correct 3 ms 764 KB Output is correct
52 Correct 3 ms 716 KB Output is correct
53 Correct 2 ms 716 KB Output is correct
54 Correct 3 ms 716 KB Output is correct
55 Correct 3 ms 956 KB Output is correct
56 Correct 3 ms 972 KB Output is correct
57 Correct 4 ms 972 KB Output is correct
58 Correct 3 ms 972 KB Output is correct
59 Correct 3 ms 920 KB Output is correct
60 Correct 3 ms 972 KB Output is correct
61 Correct 4 ms 928 KB Output is correct
62 Correct 3 ms 844 KB Output is correct
63 Correct 3 ms 844 KB Output is correct
64 Correct 3 ms 716 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 122 ms 20240 KB Output is correct
5 Correct 147 ms 21568 KB Output is correct
6 Correct 112 ms 21180 KB Output is correct
7 Correct 105 ms 20484 KB Output is correct
8 Correct 175 ms 21912 KB Output is correct
9 Correct 111 ms 21504 KB Output is correct
10 Correct 114 ms 21196 KB Output is correct
11 Correct 117 ms 20488 KB Output is correct
12 Correct 98 ms 19280 KB Output is correct
13 Correct 95 ms 19016 KB Output is correct
14 Correct 95 ms 18888 KB Output is correct
15 Correct 85 ms 18496 KB Output is correct
16 Correct 69 ms 16080 KB Output is correct
17 Correct 69 ms 15944 KB Output is correct
18 Correct 69 ms 15816 KB Output is correct
19 Correct 63 ms 15300 KB Output is correct
20 Correct 63 ms 15200 KB Output is correct
21 Correct 55 ms 15160 KB Output is correct
22 Correct 60 ms 15156 KB Output is correct
23 Correct 58 ms 15160 KB Output is correct
24 Correct 56 ms 15116 KB Output is correct
25 Correct 55 ms 15132 KB Output is correct
26 Correct 59 ms 15160 KB Output is correct
27 Correct 80 ms 15160 KB Output is correct
28 Correct 88 ms 15160 KB Output is correct
29 Correct 80 ms 15168 KB Output is correct
30 Correct 83 ms 15176 KB Output is correct
31 Correct 85 ms 15116 KB Output is correct
32 Correct 73 ms 15080 KB Output is correct
33 Correct 70 ms 15172 KB Output is correct
34 Correct 75 ms 17596 KB Output is correct
35 Correct 66 ms 16772 KB Output is correct
36 Correct 57 ms 15932 KB Output is correct
37 Correct 94 ms 18752 KB Output is correct
38 Correct 85 ms 18576 KB Output is correct
39 Correct 91 ms 18500 KB Output is correct
40 Correct 87 ms 18232 KB Output is correct
41 Correct 89 ms 18104 KB Output is correct
42 Correct 92 ms 15160 KB Output is correct
43 Correct 95 ms 18580 KB Output is correct
44 Correct 94 ms 18432 KB Output is correct
45 Correct 111 ms 18248 KB Output is correct
46 Correct 93 ms 18108 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 1 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct
54 Correct 0 ms 204 KB Output is correct
55 Correct 1 ms 204 KB Output is correct
56 Correct 0 ms 204 KB Output is correct
57 Correct 0 ms 316 KB Output is correct
58 Correct 1 ms 316 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 0 ms 204 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 0 ms 204 KB Output is correct
64 Correct 0 ms 308 KB Output is correct
65 Correct 0 ms 204 KB Output is correct
66 Correct 0 ms 204 KB Output is correct
67 Correct 0 ms 204 KB Output is correct
68 Correct 1 ms 316 KB Output is correct
69 Correct 0 ms 204 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Correct 0 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 716 KB Output is correct
75 Correct 3 ms 716 KB Output is correct
76 Correct 3 ms 716 KB Output is correct
77 Correct 2 ms 716 KB Output is correct
78 Correct 2 ms 660 KB Output is correct
79 Correct 3 ms 716 KB Output is correct
80 Correct 4 ms 844 KB Output is correct
81 Correct 4 ms 920 KB Output is correct
82 Correct 3 ms 844 KB Output is correct
83 Correct 3 ms 844 KB Output is correct
84 Correct 4 ms 716 KB Output is correct
85 Correct 4 ms 844 KB Output is correct
86 Correct 3 ms 844 KB Output is correct
87 Correct 3 ms 844 KB Output is correct
88 Correct 3 ms 716 KB Output is correct
89 Correct 3 ms 844 KB Output is correct
90 Correct 3 ms 716 KB Output is correct
91 Correct 3 ms 812 KB Output is correct
92 Correct 3 ms 716 KB Output is correct
93 Correct 3 ms 716 KB Output is correct
94 Correct 2 ms 708 KB Output is correct
95 Correct 4 ms 716 KB Output is correct
96 Correct 3 ms 716 KB Output is correct
97 Correct 3 ms 764 KB Output is correct
98 Correct 3 ms 716 KB Output is correct
99 Correct 2 ms 716 KB Output is correct
100 Correct 3 ms 716 KB Output is correct
101 Correct 3 ms 956 KB Output is correct
102 Correct 3 ms 972 KB Output is correct
103 Correct 4 ms 972 KB Output is correct
104 Correct 3 ms 972 KB Output is correct
105 Correct 3 ms 920 KB Output is correct
106 Correct 3 ms 972 KB Output is correct
107 Correct 4 ms 928 KB Output is correct
108 Correct 3 ms 844 KB Output is correct
109 Correct 3 ms 844 KB Output is correct
110 Correct 3 ms 716 KB Output is correct
111 Correct 65 ms 15168 KB Output is correct
112 Correct 63 ms 15164 KB Output is correct
113 Correct 63 ms 15168 KB Output is correct
114 Correct 64 ms 15124 KB Output is correct
115 Correct 62 ms 15176 KB Output is correct
116 Correct 91 ms 15108 KB Output is correct
117 Correct 92 ms 15296 KB Output is correct
118 Correct 177 ms 22024 KB Output is correct
119 Correct 191 ms 21192 KB Output is correct
120 Correct 135 ms 18432 KB Output is correct
121 Correct 195 ms 15172 KB Output is correct
122 Correct 138 ms 19356 KB Output is correct
123 Correct 124 ms 18888 KB Output is correct
124 Correct 115 ms 18488 KB Output is correct
125 Correct 204 ms 15164 KB Output is correct
126 Correct 94 ms 15976 KB Output is correct
127 Correct 85 ms 15904 KB Output is correct
128 Correct 81 ms 15884 KB Output is correct
129 Correct 166 ms 15176 KB Output is correct
130 Correct 76 ms 15236 KB Output is correct
131 Correct 74 ms 15168 KB Output is correct
132 Correct 69 ms 15176 KB Output is correct
133 Correct 118 ms 15172 KB Output is correct
134 Correct 69 ms 15164 KB Output is correct
135 Correct 68 ms 15180 KB Output is correct
136 Correct 64 ms 15160 KB Output is correct
137 Correct 93 ms 15296 KB Output is correct
138 Correct 81 ms 15160 KB Output is correct
139 Correct 62 ms 15112 KB Output is correct
140 Correct 59 ms 15128 KB Output is correct
141 Correct 75 ms 15068 KB Output is correct
142 Correct 153 ms 22408 KB Output is correct
143 Correct 137 ms 22388 KB Output is correct
144 Correct 117 ms 22332 KB Output is correct
145 Correct 118 ms 22284 KB Output is correct
146 Correct 116 ms 22208 KB Output is correct
147 Correct 131 ms 22004 KB Output is correct
148 Correct 120 ms 21828 KB Output is correct
149 Correct 119 ms 21832 KB Output is correct
150 Correct 117 ms 21512 KB Output is correct
151 Correct 111 ms 20824 KB Output is correct
152 Correct 78 ms 15180 KB Output is correct
153 Correct 129 ms 22340 KB Output is correct
154 Correct 122 ms 22204 KB Output is correct
155 Correct 115 ms 22096 KB Output is correct
156 Correct 114 ms 21836 KB Output is correct
157 Correct 111 ms 21704 KB Output is correct
158 Correct 117 ms 21640 KB Output is correct
159 Correct 106 ms 20924 KB Output is correct
160 Correct 77 ms 15164 KB Output is correct
161 Correct 151 ms 18752 KB Output is correct
162 Correct 148 ms 18596 KB Output is correct
163 Correct 134 ms 18572 KB Output is correct
164 Correct 128 ms 18232 KB Output is correct
165 Correct 130 ms 18188 KB Output is correct
166 Correct 87 ms 15168 KB Output is correct
167 Correct 98 ms 18620 KB Output is correct
168 Correct 94 ms 18512 KB Output is correct
169 Correct 91 ms 18328 KB Output is correct
170 Correct 90 ms 18112 KB Output is correct
171 Correct 101 ms 18008 KB Output is correct
172 Correct 91 ms 18780 KB Output is correct
173 Correct 166 ms 18748 KB Output is correct
174 Correct 161 ms 18688 KB Output is correct
175 Correct 139 ms 18704 KB Output is correct
176 Correct 136 ms 17980 KB Output is correct