oj.uz

Submission #390804

# Submission time Handle Problem Language Result Execution time Memory
390804 2021-04-17T02:48:22 Z couplefire Event Hopping 2 (JOI21_event2) C++17
100 / 100
 512 ms 18156 KB 
#include <bits/stdc++.h>
using namespace std;
#define MAXN 100005
#define INF 1000000009

int n, k, m;
array<int, 2> arr[MAXN];
vector<array<int, 2>> tmp;
vector<array<int, 2>> good;
set<array<int, 2>> st;
int dp[MAXN];
int fa[MAXN][20];

bool cmp(array<int, 2> a, array<int, 2> b){
    if(a[1] != b[1]) return a[1] < b[1];
    return a[0] < b[0];
}

int get(int l, int r){
    int p = lower_bound(good.begin(), good.end(), array<int, 2>{r, r}, cmp)-good.begin()-1;
    if(good[p][0] < l) return 0;
    int res = dp[p];
    for(int i = 19; i>=0; i--){
        if(good[fa[p][i]][0] >= l) p = fa[p][i];
    }
    p = lower_bound(good.begin(), good.end(), array<int, 2>{good[p][0], good[p][0]}, cmp)-good.begin()-1;
    return res - dp[p];
}

int main(){
    // freopen("a.in", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k;
    tmp.resize(n);
    for(int i = 0; i<n; i++){
        cin >> arr[i][0] >> arr[i][1];
        tmp[i] = arr[i];
    }
    sort(tmp.begin(), tmp.end(), [&](array<int, 2> a, array<int, 2> b){
        return a[1]-a[0] < b[1]-b[0];
    });
    for(auto p : tmp){
        auto it = st.lower_bound(p);
        if(it != st.end() && (*it)[1] <= p[1]) continue;
        good.push_back(p);
        st.insert(p);
    }
    sort(good.begin(), good.end());
    m = good.size();
    good.insert(good.begin(), {-2, -1});
    for(int i = 1; i<=m; i++){
        int pos = lower_bound(good.begin(), good.end(), array<int,2>{good[i][0], good[i][0]}, cmp)-good.begin()-1;
        dp[i] = 1+dp[pos];
        fa[i][0] = pos;
        for(int j = 1; j<20; j++) fa[i][j] = fa[fa[i][j-1]][j-1];
    }
    if(dp[m] < k){
        cout << -1 << endl;
        exit(0);
    }
    st.clear();
    st.insert({1, INF});
    int cnt = 0;
    int curans = dp[m];
    for(int i = 0; i<n; i++){
        if(cnt >= k) break;
        auto it = st.lower_bound(arr[i]);
        if(it == st.end() || (*it)[0] > arr[i][0]){
            if(it == st.begin()) continue;
            --it;
        }
        if((*it)[1] < arr[i][1]) continue;
        int l1 = (*it)[0], l2 = arr[i][0], r2 = arr[i][1], r1 = (*it)[1];
        int prvans = curans;
        curans -= get(l1, r1);
        curans += get(l1, l2); curans += get(r2, r1);
        curans++;
        if(curans >= k) cout << i+1 << endl, cnt++, st.erase(it), st.insert({l1, l2}), st.insert({r2, r1});
        else curans = prvans;
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 412 ms 15972 KB Output is correct
5 Correct 390 ms 17828 KB Output is correct
6 Correct 388 ms 17976 KB Output is correct
7 Correct 375 ms 17752 KB Output is correct
8 Correct 409 ms 18000 KB Output is correct
9 Correct 392 ms 17880 KB Output is correct
10 Correct 376 ms 17924 KB Output is correct
11 Correct 379 ms 17784 KB Output is correct
12 Correct 293 ms 16696 KB Output is correct
13 Correct 288 ms 16872 KB Output is correct
14 Correct 301 ms 16752 KB Output is correct
15 Correct 256 ms 16604 KB Output is correct
16 Correct 140 ms 11328 KB Output is correct
17 Correct 132 ms 11396 KB Output is correct
18 Correct 122 ms 11324 KB Output is correct
19 Correct 69 ms 6276 KB Output is correct
20 Correct 68 ms 6208 KB Output is correct
21 Correct 82 ms 6252 KB Output is correct
22 Correct 51 ms 4512 KB Output is correct
23 Correct 51 ms 4604 KB Output is correct
24 Correct 51 ms 4588 KB Output is correct
25 Correct 44 ms 4036 KB Output is correct
26 Correct 45 ms 3948 KB Output is correct
27 Correct 45 ms 3960 KB Output is correct
28 Correct 126 ms 17352 KB Output is correct
29 Correct 115 ms 16440 KB Output is correct
30 Correct 89 ms 11192 KB Output is correct
31 Correct 61 ms 6220 KB Output is correct
32 Correct 48 ms 4580 KB Output is correct
33 Correct 46 ms 4076 KB Output is correct
34 Correct 264 ms 16632 KB Output is correct
35 Correct 185 ms 16460 KB Output is correct
36 Correct 151 ms 16608 KB Output is correct
37 Correct 239 ms 10928 KB Output is correct
38 Correct 239 ms 10992 KB Output is correct
39 Correct 231 ms 10900 KB Output is correct
40 Correct 233 ms 10836 KB Output is correct
41 Correct 218 ms 10952 KB Output is correct
42 Correct 87 ms 10688 KB Output is correct
43 Correct 262 ms 10840 KB Output is correct
44 Correct 225 ms 10920 KB Output is correct
45 Correct 222 ms 10832 KB Output is correct
46 Correct 216 ms 10900 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 208 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 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 340 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 336 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 332 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 208 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 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 340 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 336 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 2 ms 332 KB Output is correct
31 Correct 2 ms 460 KB Output is correct
32 Correct 2 ms 344 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 2 ms 344 KB Output is correct
35 Correct 12 ms 800 KB Output is correct
36 Correct 12 ms 844 KB Output is correct
37 Correct 11 ms 844 KB Output is correct
38 Correct 3 ms 852 KB Output is correct
39 Correct 11 ms 844 KB Output is correct
40 Correct 10 ms 756 KB Output is correct
41 Correct 9 ms 852 KB Output is correct
42 Correct 3 ms 772 KB Output is correct
43 Correct 6 ms 716 KB Output is correct
44 Correct 6 ms 716 KB Output is correct
45 Correct 6 ms 716 KB Output is correct
46 Correct 3 ms 716 KB Output is correct
47 Correct 3 ms 460 KB Output is correct
48 Correct 3 ms 460 KB Output is correct
49 Correct 3 ms 460 KB Output is correct
50 Correct 2 ms 460 KB Output is correct
51 Correct 2 ms 460 KB Output is correct
52 Correct 2 ms 460 KB Output is correct
53 Correct 3 ms 420 KB Output is correct
54 Correct 3 ms 460 KB Output is correct
55 Correct 13 ms 820 KB Output is correct
56 Correct 12 ms 852 KB Output is correct
57 Correct 11 ms 848 KB Output is correct
58 Correct 11 ms 844 KB Output is correct
59 Correct 11 ms 844 KB Output is correct
60 Correct 11 ms 844 KB Output is correct
61 Correct 11 ms 808 KB Output is correct
62 Correct 11 ms 844 KB Output is correct
63 Correct 10 ms 844 KB Output is correct
64 Correct 4 ms 804 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 412 ms 15972 KB Output is correct
5 Correct 390 ms 17828 KB Output is correct
6 Correct 388 ms 17976 KB Output is correct
7 Correct 375 ms 17752 KB Output is correct
8 Correct 409 ms 18000 KB Output is correct
9 Correct 392 ms 17880 KB Output is correct
10 Correct 376 ms 17924 KB Output is correct
11 Correct 379 ms 17784 KB Output is correct
12 Correct 293 ms 16696 KB Output is correct
13 Correct 288 ms 16872 KB Output is correct
14 Correct 301 ms 16752 KB Output is correct
15 Correct 256 ms 16604 KB Output is correct
16 Correct 140 ms 11328 KB Output is correct
17 Correct 132 ms 11396 KB Output is correct
18 Correct 122 ms 11324 KB Output is correct
19 Correct 69 ms 6276 KB Output is correct
20 Correct 68 ms 6208 KB Output is correct
21 Correct 82 ms 6252 KB Output is correct
22 Correct 51 ms 4512 KB Output is correct
23 Correct 51 ms 4604 KB Output is correct
24 Correct 51 ms 4588 KB Output is correct
25 Correct 44 ms 4036 KB Output is correct
26 Correct 45 ms 3948 KB Output is correct
27 Correct 45 ms 3960 KB Output is correct
28 Correct 126 ms 17352 KB Output is correct
29 Correct 115 ms 16440 KB Output is correct
30 Correct 89 ms 11192 KB Output is correct
31 Correct 61 ms 6220 KB Output is correct
32 Correct 48 ms 4580 KB Output is correct
33 Correct 46 ms 4076 KB Output is correct
34 Correct 264 ms 16632 KB Output is correct
35 Correct 185 ms 16460 KB Output is correct
36 Correct 151 ms 16608 KB Output is correct
37 Correct 239 ms 10928 KB Output is correct
38 Correct 239 ms 10992 KB Output is correct
39 Correct 231 ms 10900 KB Output is correct
40 Correct 233 ms 10836 KB Output is correct
41 Correct 218 ms 10952 KB Output is correct
42 Correct 87 ms 10688 KB Output is correct
43 Correct 262 ms 10840 KB Output is correct
44 Correct 225 ms 10920 KB Output is correct
45 Correct 222 ms 10832 KB Output is correct
46 Correct 216 ms 10900 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 208 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 332 KB Output is correct
54 Correct 1 ms 332 KB Output is correct
55 Correct 1 ms 340 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 336 KB Output is correct
60 Correct 1 ms 328 KB Output is correct
61 Correct 1 ms 332 KB Output is correct
62 Correct 1 ms 332 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct
65 Correct 1 ms 332 KB Output is correct
66 Correct 1 ms 332 KB Output is correct
67 Correct 1 ms 332 KB Output is correct
68 Correct 1 ms 332 KB Output is correct
69 Correct 1 ms 332 KB Output is correct
70 Correct 1 ms 336 KB Output is correct
71 Correct 1 ms 332 KB Output is correct
72 Correct 1 ms 336 KB Output is correct
73 Correct 1 ms 332 KB Output is correct
74 Correct 2 ms 332 KB Output is correct
75 Correct 2 ms 336 KB Output is correct
76 Correct 2 ms 332 KB Output is correct
77 Correct 2 ms 460 KB Output is correct
78 Correct 2 ms 344 KB Output is correct
79 Correct 2 ms 460 KB Output is correct
80 Correct 2 ms 344 KB Output is correct
81 Correct 12 ms 800 KB Output is correct
82 Correct 12 ms 844 KB Output is correct
83 Correct 11 ms 844 KB Output is correct
84 Correct 3 ms 852 KB Output is correct
85 Correct 11 ms 844 KB Output is correct
86 Correct 10 ms 756 KB Output is correct
87 Correct 9 ms 852 KB Output is correct
88 Correct 3 ms 772 KB Output is correct
89 Correct 6 ms 716 KB Output is correct
90 Correct 6 ms 716 KB Output is correct
91 Correct 6 ms 716 KB Output is correct
92 Correct 3 ms 716 KB Output is correct
93 Correct 3 ms 460 KB Output is correct
94 Correct 3 ms 460 KB Output is correct
95 Correct 3 ms 460 KB Output is correct
96 Correct 2 ms 460 KB Output is correct
97 Correct 2 ms 460 KB Output is correct
98 Correct 2 ms 460 KB Output is correct
99 Correct 3 ms 420 KB Output is correct
100 Correct 3 ms 460 KB Output is correct
101 Correct 13 ms 820 KB Output is correct
102 Correct 12 ms 852 KB Output is correct
103 Correct 11 ms 848 KB Output is correct
104 Correct 11 ms 844 KB Output is correct
105 Correct 11 ms 844 KB Output is correct
106 Correct 11 ms 844 KB Output is correct
107 Correct 11 ms 808 KB Output is correct
108 Correct 11 ms 844 KB Output is correct
109 Correct 10 ms 844 KB Output is correct
110 Correct 4 ms 804 KB Output is correct
111 Correct 57 ms 3808 KB Output is correct
112 Correct 54 ms 3896 KB Output is correct
113 Correct 48 ms 3904 KB Output is correct
114 Correct 44 ms 3908 KB Output is correct
115 Correct 44 ms 3824 KB Output is correct
116 Correct 48 ms 3784 KB Output is correct
117 Correct 40 ms 3896 KB Output is correct
118 Correct 512 ms 17916 KB Output is correct
119 Correct 490 ms 17956 KB Output is correct
120 Correct 320 ms 16704 KB Output is correct
121 Correct 119 ms 16412 KB Output is correct
122 Correct 445 ms 16752 KB Output is correct
123 Correct 351 ms 16788 KB Output is correct
124 Correct 337 ms 16648 KB Output is correct
125 Correct 117 ms 16464 KB Output is correct
126 Correct 173 ms 11320 KB Output is correct
127 Correct 158 ms 11256 KB Output is correct
128 Correct 147 ms 11296 KB Output is correct
129 Correct 87 ms 11320 KB Output is correct
130 Correct 114 ms 6272 KB Output is correct
131 Correct 104 ms 6252 KB Output is correct
132 Correct 83 ms 6208 KB Output is correct
133 Correct 60 ms 6208 KB Output is correct
134 Correct 71 ms 4520 KB Output is correct
135 Correct 65 ms 4548 KB Output is correct
136 Correct 56 ms 4580 KB Output is correct
137 Correct 60 ms 4576 KB Output is correct
138 Correct 49 ms 4020 KB Output is correct
139 Correct 53 ms 3964 KB Output is correct
140 Correct 45 ms 4032 KB Output is correct
141 Correct 44 ms 3952 KB Output is correct
142 Correct 450 ms 18076 KB Output is correct
143 Correct 444 ms 18124 KB Output is correct
144 Correct 441 ms 18156 KB Output is correct
145 Correct 427 ms 17992 KB Output is correct
146 Correct 427 ms 18080 KB Output is correct
147 Correct 422 ms 18048 KB Output is correct
148 Correct 411 ms 17976 KB Output is correct
149 Correct 407 ms 18024 KB Output is correct
150 Correct 416 ms 17992 KB Output is correct
151 Correct 392 ms 17992 KB Output is correct
152 Correct 125 ms 17580 KB Output is correct
153 Correct 460 ms 18008 KB Output is correct
154 Correct 431 ms 17984 KB Output is correct
155 Correct 415 ms 18136 KB Output is correct
156 Correct 415 ms 18032 KB Output is correct
157 Correct 426 ms 18152 KB Output is correct
158 Correct 414 ms 18132 KB Output is correct
159 Correct 371 ms 18136 KB Output is correct
160 Correct 123 ms 17464 KB Output is correct
161 Correct 402 ms 17732 KB Output is correct
162 Correct 347 ms 17668 KB Output is correct
163 Correct 333 ms 17680 KB Output is correct
164 Correct 319 ms 17684 KB Output is correct
165 Correct 315 ms 17732 KB Output is correct
166 Correct 86 ms 10628 KB Output is correct
167 Correct 235 ms 10848 KB Output is correct
168 Correct 263 ms 10948 KB Output is correct
169 Correct 221 ms 10912 KB Output is correct
170 Correct 213 ms 10844 KB Output is correct
171 Correct 254 ms 17116 KB Output is correct
172 Correct 258 ms 17928 KB Output is correct
173 Correct 397 ms 17788 KB Output is correct
174 Correct 414 ms 17724 KB Output is correct
175 Correct 382 ms 17676 KB Output is correct
176 Correct 329 ms 17632 KB Output is correct