oj.uz

Submission #577199

# Submission time Handle Problem Language Result Execution time Memory
577199 2022-06-14T09:14:34 Z dantoh000 Event Hopping 2 (JOI21_event2) C++14
100 / 100
 234 ms 22520 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;
typedef pair<int,int> ii;
int n,k;
int l[100005];
int r[100005];
ii a[100005];
set<ii> s;
vector<int> ans;
int p[17][100005];
int st[17][100005];
int cur = 0;
int MX(int l, int r){
    if (l == r) return st[0][l];
    int d = 31-__builtin_clz(r-l+1);
    return max(st[d][l], st[d][r-(1<<d)+1]);
}

int find(int x){

    int lo = 1, hi = n;
    while (lo < hi){
        int mid = (lo+hi)/2;
        if (MX(1, mid) >= x){
            hi = mid;
        }
        else lo = mid+1;
    }
    return lo;
}
int query(int l, int r){

    int x = find(l);
    if (a[x].se > r || a[x].fi < l) return 0;
    int ret = 1;
    for (int i = 16; i >= 0; i--){
        if (p[i][x] && a[p[i][x]].se <= r){
            x = p[i][x];
            ret += (1<<i);
        }
    }
    ///printf("querying %d %d --> %d\n",l,r, ret);
    return ret;
}

bool add(int l, int r){
    auto it = s.lower_bound({r, -1});
    assert(it != s.begin());
    auto LL = prev(it);
    auto RR = it;
    if (LL->se > l) return false;

    int L = LL->se;
    int R = RR->fi;
    int nw = cur - query(L, R) + query(L, l) + query(r, R) + 1;
    if (nw >= k){
        cur = nw;
        return true;
    }
    else return false;

}
int main(){
    scanf("%d%d",&n,&k);
    for (int i = 1; i <= n; i++){
        scanf("%d%d",&l[i], &r[i]);
        a[i] = {l[i], r[i]};
    }
    sort(a+1, a+n+1, [](ii a, ii b){
            return a.se < b.se;
    });
    for (int i = 1; i <= n; i++){
        st[0][i] = a[i].fi;
    }
    for (int k = 1; k < 17; k++){
        for (int i = 1; i <= n; i++){
            if (i + (1<<(k-1)) <= n){
                st[k][i] = max(st[k-1][i], st[k-1][i+(1<<(k-1))]);
            }
        }
    }
    memset(p, 0, sizeof(p));
    for (int i = 1; i <= n; i++){
        p[0][i] = find(a[i].se);
        if (a[p[0][i]].fi < a[i].se) p[0][i] = 0;
    }
    for (int k = 1; k < 17; k++){
        for (int i = 1; i <= n; i++){
            if (p[k-1][i]) p[k][i] = p[k-1][p[k-1][i]];
        }
    }
    s.insert({0,0});
    s.insert({1000000001,1000000001});
    cur = query(1, 1000000000);
    ///printf("%d\n",cur);
    if (cur < k){
        printf("-1\n");
        return 0;
    }
    for (int i = 1; i <= n; i++){
        if (add(l[i], r[i])){

            ans.push_back(i);
            s.insert({l[i], r[i]});
        }
    }
    for (int i = 0; i < k; i++) printf("%d\n",ans[i]);
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:66:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |     scanf("%d%d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~
event2.cpp:68:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         scanf("%d%d",&l[i], &r[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6868 KB Output is correct
2 Correct 4 ms 6868 KB Output is correct
3 Correct 3 ms 6868 KB Output is correct
4 Correct 113 ms 20180 KB Output is correct
5 Correct 109 ms 20132 KB Output is correct
6 Correct 108 ms 20044 KB Output is correct
7 Correct 107 ms 20040 KB Output is correct
8 Correct 119 ms 20264 KB Output is correct
9 Correct 107 ms 20160 KB Output is correct
10 Correct 110 ms 20068 KB Output is correct
11 Correct 114 ms 20040 KB Output is correct
12 Correct 88 ms 18116 KB Output is correct
13 Correct 84 ms 18060 KB Output is correct
14 Correct 84 ms 18096 KB Output is correct
15 Correct 85 ms 18108 KB Output is correct
16 Correct 51 ms 15564 KB Output is correct
17 Correct 49 ms 15488 KB Output is correct
18 Correct 52 ms 15576 KB Output is correct
19 Correct 45 ms 14924 KB Output is correct
20 Correct 43 ms 15180 KB Output is correct
21 Correct 44 ms 15164 KB Output is correct
22 Correct 51 ms 15160 KB Output is correct
23 Correct 41 ms 15180 KB Output is correct
24 Correct 45 ms 15108 KB Output is correct
25 Correct 55 ms 15292 KB Output is correct
26 Correct 43 ms 15096 KB Output is correct
27 Correct 41 ms 15144 KB Output is correct
28 Correct 40 ms 15172 KB Output is correct
29 Correct 39 ms 15184 KB Output is correct
30 Correct 40 ms 15108 KB Output is correct
31 Correct 40 ms 15180 KB Output is correct
32 Correct 43 ms 15132 KB Output is correct
33 Correct 40 ms 15080 KB Output is correct
34 Correct 82 ms 18192 KB Output is correct
35 Correct 86 ms 18212 KB Output is correct
36 Correct 81 ms 18040 KB Output is correct
37 Correct 87 ms 17992 KB Output is correct
38 Correct 85 ms 17992 KB Output is correct
39 Correct 79 ms 17992 KB Output is correct
40 Correct 77 ms 17996 KB Output is correct
41 Correct 81 ms 17904 KB Output is correct
42 Correct 47 ms 15148 KB Output is correct
43 Correct 81 ms 17792 KB Output is correct
44 Correct 84 ms 17832 KB Output is correct
45 Correct 78 ms 17668 KB Output is correct
46 Correct 80 ms 17688 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6868 KB Output is correct
2 Correct 3 ms 6868 KB Output is correct
3 Correct 4 ms 6868 KB Output is correct
4 Correct 3 ms 6996 KB Output is correct
5 Correct 3 ms 6924 KB Output is correct
6 Correct 3 ms 6996 KB Output is correct
7 Correct 3 ms 6996 KB Output is correct
8 Correct 4 ms 6996 KB Output is correct
9 Correct 3 ms 6996 KB Output is correct
10 Correct 3 ms 6996 KB Output is correct
11 Correct 3 ms 6968 KB Output is correct
12 Correct 3 ms 6996 KB Output is correct
13 Correct 3 ms 6996 KB Output is correct
14 Correct 3 ms 6996 KB Output is correct
15 Correct 4 ms 6916 KB Output is correct
16 Correct 4 ms 6968 KB Output is correct
17 Correct 3 ms 6996 KB Output is correct
18 Correct 4 ms 6964 KB Output is correct
19 Correct 4 ms 6996 KB Output is correct
20 Correct 3 ms 6996 KB Output is correct
21 Correct 3 ms 6996 KB Output is correct
22 Correct 3 ms 6996 KB Output is correct
23 Correct 4 ms 6996 KB Output is correct
24 Correct 3 ms 6996 KB Output is correct
25 Correct 4 ms 6996 KB Output is correct
26 Correct 3 ms 6996 KB Output is correct
27 Correct 3 ms 6996 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6868 KB Output is correct
2 Correct 3 ms 6868 KB Output is correct
3 Correct 4 ms 6868 KB Output is correct
4 Correct 3 ms 6996 KB Output is correct
5 Correct 3 ms 6924 KB Output is correct
6 Correct 3 ms 6996 KB Output is correct
7 Correct 3 ms 6996 KB Output is correct
8 Correct 4 ms 6996 KB Output is correct
9 Correct 3 ms 6996 KB Output is correct
10 Correct 3 ms 6996 KB Output is correct
11 Correct 3 ms 6968 KB Output is correct
12 Correct 3 ms 6996 KB Output is correct
13 Correct 3 ms 6996 KB Output is correct
14 Correct 3 ms 6996 KB Output is correct
15 Correct 4 ms 6916 KB Output is correct
16 Correct 4 ms 6968 KB Output is correct
17 Correct 3 ms 6996 KB Output is correct
18 Correct 4 ms 6964 KB Output is correct
19 Correct 4 ms 6996 KB Output is correct
20 Correct 3 ms 6996 KB Output is correct
21 Correct 3 ms 6996 KB Output is correct
22 Correct 3 ms 6996 KB Output is correct
23 Correct 4 ms 6996 KB Output is correct
24 Correct 3 ms 6996 KB Output is correct
25 Correct 4 ms 6996 KB Output is correct
26 Correct 3 ms 6996 KB Output is correct
27 Correct 3 ms 6996 KB Output is correct
28 Correct 4 ms 7252 KB Output is correct
29 Correct 5 ms 7252 KB Output is correct
30 Correct 4 ms 7252 KB Output is correct
31 Correct 5 ms 7212 KB Output is correct
32 Correct 5 ms 7192 KB Output is correct
33 Correct 6 ms 7240 KB Output is correct
34 Correct 4 ms 7252 KB Output is correct
35 Correct 6 ms 7380 KB Output is correct
36 Correct 7 ms 7372 KB Output is correct
37 Correct 6 ms 7364 KB Output is correct
38 Correct 4 ms 7252 KB Output is correct
39 Correct 6 ms 7368 KB Output is correct
40 Correct 6 ms 7380 KB Output is correct
41 Correct 6 ms 7380 KB Output is correct
42 Correct 4 ms 7252 KB Output is correct
43 Correct 5 ms 7252 KB Output is correct
44 Correct 5 ms 7252 KB Output is correct
45 Correct 6 ms 7220 KB Output is correct
46 Correct 4 ms 7236 KB Output is correct
47 Correct 5 ms 7252 KB Output is correct
48 Correct 5 ms 7240 KB Output is correct
49 Correct 5 ms 7252 KB Output is correct
50 Correct 4 ms 7252 KB Output is correct
51 Correct 5 ms 7252 KB Output is correct
52 Correct 4 ms 7252 KB Output is correct
53 Correct 4 ms 7236 KB Output is correct
54 Correct 4 ms 7252 KB Output is correct
55 Correct 6 ms 7364 KB Output is correct
56 Correct 7 ms 7380 KB Output is correct
57 Correct 7 ms 7392 KB Output is correct
58 Correct 6 ms 7428 KB Output is correct
59 Correct 6 ms 7364 KB Output is correct
60 Correct 6 ms 7380 KB Output is correct
61 Correct 6 ms 7380 KB Output is correct
62 Correct 5 ms 7336 KB Output is correct
63 Correct 6 ms 7380 KB Output is correct
64 Correct 4 ms 7252 KB Output is correct

Subtask #4
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6868 KB Output is correct
2 Correct 4 ms 6868 KB Output is correct
3 Correct 3 ms 6868 KB Output is correct
4 Correct 113 ms 20180 KB Output is correct
5 Correct 109 ms 20132 KB Output is correct
6 Correct 108 ms 20044 KB Output is correct
7 Correct 107 ms 20040 KB Output is correct
8 Correct 119 ms 20264 KB Output is correct
9 Correct 107 ms 20160 KB Output is correct
10 Correct 110 ms 20068 KB Output is correct
11 Correct 114 ms 20040 KB Output is correct
12 Correct 88 ms 18116 KB Output is correct
13 Correct 84 ms 18060 KB Output is correct
14 Correct 84 ms 18096 KB Output is correct
15 Correct 85 ms 18108 KB Output is correct
16 Correct 51 ms 15564 KB Output is correct
17 Correct 49 ms 15488 KB Output is correct
18 Correct 52 ms 15576 KB Output is correct
19 Correct 45 ms 14924 KB Output is correct
20 Correct 43 ms 15180 KB Output is correct
21 Correct 44 ms 15164 KB Output is correct
22 Correct 51 ms 15160 KB Output is correct
23 Correct 41 ms 15180 KB Output is correct
24 Correct 45 ms 15108 KB Output is correct
25 Correct 55 ms 15292 KB Output is correct
26 Correct 43 ms 15096 KB Output is correct
27 Correct 41 ms 15144 KB Output is correct
28 Correct 40 ms 15172 KB Output is correct
29 Correct 39 ms 15184 KB Output is correct
30 Correct 40 ms 15108 KB Output is correct
31 Correct 40 ms 15180 KB Output is correct
32 Correct 43 ms 15132 KB Output is correct
33 Correct 40 ms 15080 KB Output is correct
34 Correct 82 ms 18192 KB Output is correct
35 Correct 86 ms 18212 KB Output is correct
36 Correct 81 ms 18040 KB Output is correct
37 Correct 87 ms 17992 KB Output is correct
38 Correct 85 ms 17992 KB Output is correct
39 Correct 79 ms 17992 KB Output is correct
40 Correct 77 ms 17996 KB Output is correct
41 Correct 81 ms 17904 KB Output is correct
42 Correct 47 ms 15148 KB Output is correct
43 Correct 81 ms 17792 KB Output is correct
44 Correct 84 ms 17832 KB Output is correct
45 Correct 78 ms 17668 KB Output is correct
46 Correct 80 ms 17688 KB Output is correct
47 Correct 3 ms 6868 KB Output is correct
48 Correct 3 ms 6868 KB Output is correct
49 Correct 4 ms 6868 KB Output is correct
50 Correct 3 ms 6996 KB Output is correct
51 Correct 3 ms 6924 KB Output is correct
52 Correct 3 ms 6996 KB Output is correct
53 Correct 3 ms 6996 KB Output is correct
54 Correct 4 ms 6996 KB Output is correct
55 Correct 3 ms 6996 KB Output is correct
56 Correct 3 ms 6996 KB Output is correct
57 Correct 3 ms 6968 KB Output is correct
58 Correct 3 ms 6996 KB Output is correct
59 Correct 3 ms 6996 KB Output is correct
60 Correct 3 ms 6996 KB Output is correct
61 Correct 4 ms 6916 KB Output is correct
62 Correct 4 ms 6968 KB Output is correct
63 Correct 3 ms 6996 KB Output is correct
64 Correct 4 ms 6964 KB Output is correct
65 Correct 4 ms 6996 KB Output is correct
66 Correct 3 ms 6996 KB Output is correct
67 Correct 3 ms 6996 KB Output is correct
68 Correct 3 ms 6996 KB Output is correct
69 Correct 4 ms 6996 KB Output is correct
70 Correct 3 ms 6996 KB Output is correct
71 Correct 4 ms 6996 KB Output is correct
72 Correct 3 ms 6996 KB Output is correct
73 Correct 3 ms 6996 KB Output is correct
74 Correct 4 ms 7252 KB Output is correct
75 Correct 5 ms 7252 KB Output is correct
76 Correct 4 ms 7252 KB Output is correct
77 Correct 5 ms 7212 KB Output is correct
78 Correct 5 ms 7192 KB Output is correct
79 Correct 6 ms 7240 KB Output is correct
80 Correct 4 ms 7252 KB Output is correct
81 Correct 6 ms 7380 KB Output is correct
82 Correct 7 ms 7372 KB Output is correct
83 Correct 6 ms 7364 KB Output is correct
84 Correct 4 ms 7252 KB Output is correct
85 Correct 6 ms 7368 KB Output is correct
86 Correct 6 ms 7380 KB Output is correct
87 Correct 6 ms 7380 KB Output is correct
88 Correct 4 ms 7252 KB Output is correct
89 Correct 5 ms 7252 KB Output is correct
90 Correct 5 ms 7252 KB Output is correct
91 Correct 6 ms 7220 KB Output is correct
92 Correct 4 ms 7236 KB Output is correct
93 Correct 5 ms 7252 KB Output is correct
94 Correct 5 ms 7240 KB Output is correct
95 Correct 5 ms 7252 KB Output is correct
96 Correct 4 ms 7252 KB Output is correct
97 Correct 5 ms 7252 KB Output is correct
98 Correct 4 ms 7252 KB Output is correct
99 Correct 4 ms 7236 KB Output is correct
100 Correct 4 ms 7252 KB Output is correct
101 Correct 6 ms 7364 KB Output is correct
102 Correct 7 ms 7380 KB Output is correct
103 Correct 7 ms 7392 KB Output is correct
104 Correct 6 ms 7428 KB Output is correct
105 Correct 6 ms 7364 KB Output is correct
106 Correct 6 ms 7380 KB Output is correct
107 Correct 6 ms 7380 KB Output is correct
108 Correct 5 ms 7336 KB Output is correct
109 Correct 6 ms 7380 KB Output is correct
110 Correct 4 ms 7252 KB Output is correct
111 Correct 49 ms 16848 KB Output is correct
112 Correct 52 ms 16868 KB Output is correct
113 Correct 49 ms 16768 KB Output is correct
114 Correct 45 ms 16828 KB Output is correct
115 Correct 45 ms 16868 KB Output is correct
116 Correct 41 ms 16840 KB Output is correct
117 Correct 45 ms 16860 KB Output is correct
118 Correct 234 ms 22080 KB Output is correct
119 Correct 175 ms 22068 KB Output is correct
120 Correct 130 ms 19888 KB Output is correct
121 Correct 46 ms 16856 KB Output is correct
122 Correct 137 ms 20120 KB Output is correct
123 Correct 128 ms 19884 KB Output is correct
124 Correct 129 ms 19912 KB Output is correct
125 Correct 47 ms 16860 KB Output is correct
126 Correct 90 ms 17556 KB Output is correct
127 Correct 77 ms 17472 KB Output is correct
128 Correct 78 ms 17364 KB Output is correct
129 Correct 45 ms 16824 KB Output is correct
130 Correct 66 ms 16872 KB Output is correct
131 Correct 58 ms 16844 KB Output is correct
132 Correct 57 ms 16852 KB Output is correct
133 Correct 43 ms 16768 KB Output is correct
134 Correct 61 ms 16824 KB Output is correct
135 Correct 51 ms 16844 KB Output is correct
136 Correct 49 ms 16848 KB Output is correct
137 Correct 45 ms 16796 KB Output is correct
138 Correct 49 ms 16848 KB Output is correct
139 Correct 51 ms 16868 KB Output is correct
140 Correct 58 ms 16840 KB Output is correct
141 Correct 42 ms 16848 KB Output is correct
142 Correct 117 ms 22480 KB Output is correct
143 Correct 114 ms 22436 KB Output is correct
144 Correct 123 ms 22520 KB Output is correct
145 Correct 109 ms 22460 KB Output is correct
146 Correct 108 ms 22480 KB Output is correct
147 Correct 103 ms 22428 KB Output is correct
148 Correct 106 ms 22444 KB Output is correct
149 Correct 113 ms 22372 KB Output is correct
150 Correct 106 ms 22344 KB Output is correct
151 Correct 102 ms 22300 KB Output is correct
152 Correct 42 ms 16736 KB Output is correct
153 Correct 134 ms 22408 KB Output is correct
154 Correct 106 ms 22432 KB Output is correct
155 Correct 108 ms 22476 KB Output is correct
156 Correct 106 ms 22476 KB Output is correct
157 Correct 106 ms 22372 KB Output is correct
158 Correct 102 ms 22468 KB Output is correct
159 Correct 113 ms 22352 KB Output is correct
160 Correct 41 ms 16856 KB Output is correct
161 Correct 133 ms 19696 KB Output is correct
162 Correct 122 ms 19664 KB Output is correct
163 Correct 121 ms 19660 KB Output is correct
164 Correct 129 ms 19540 KB Output is correct
165 Correct 126 ms 19612 KB Output is correct
166 Correct 45 ms 16856 KB Output is correct
167 Correct 82 ms 19788 KB Output is correct
168 Correct 85 ms 19480 KB Output is correct
169 Correct 83 ms 19324 KB Output is correct
170 Correct 105 ms 19252 KB Output is correct
171 Correct 81 ms 19016 KB Output is correct
172 Correct 88 ms 19656 KB Output is correct
173 Correct 165 ms 19672 KB Output is correct
174 Correct 143 ms 19656 KB Output is correct
175 Correct 149 ms 19544 KB Output is correct
176 Correct 125 ms 19272 KB Output is correct