oj.uz

Submission #389727

# Submission time Handle Problem Language Result Execution time Memory
389727 2021-04-14T12:13:13 Z georgerapeanu Event Hopping 2 (JOI21_event2) C++11
100 / 100
 361 ms 38120 KB 
#include <bits/stdc++.h>

using namespace std;

const int LGMAX = 17;
const int NMAX = 1e5;

int n,k;
map<int,int> to_norm;
int skip_list[LGMAX + 1 + 1][2 * NMAX + 5];
pair<int,int> v[NMAX + 5];
int closest_endpoint[2 * NMAX + 5];

int get_segment_count(int l,int r){
    if(l > r){
        return 0;
    }
    int ans = 0;
    for(int h = LGMAX;h >= 0;h--){
        if(skip_list[h][l] != 0 && skip_list[h][l] <= r + 1){
            ans += (1 << h);
            l = skip_list[h][l];
        }
    }
    return ans;
}

int aib[2 * NMAX + 5];

void update(int pos){
    for(;pos <= 2 * n + 3;pos += (-pos) & pos){
        aib[pos] ^= 1;
    }
}

int query(int pos){
    int ans = 0;

    for(;pos;pos -= (-pos) & pos){
        ans ^= aib[pos];
    }

    return ans;
}

set<int> pos; 

int main(){

   
    scanf("%d %d",&n,&k);

    for(int i = 1;i <= n;i++){
        scanf("%d %d",&v[i].first,&v[i].second);
        v[i].second--;
        to_norm[v[i].first] = 1;
        to_norm[v[i].second] = 1;
    }

    int lst = 0;

    for(auto &it:to_norm){
        it.second = ++lst;
    }

    for(int i = 1;i <= lst + 1;i++){
        closest_endpoint[i] = 1e9;
    }

    for(int i = 1;i <= n;i++){
        v[i].first = to_norm[v[i].first];
        v[i].second = to_norm[v[i].second];
        closest_endpoint[v[i].first] = min(closest_endpoint[v[i].first],v[i].second);
    }

    for(int i = lst;i;i--){
        skip_list[0][i] = skip_list[0][i + 1];
        if(closest_endpoint[i] != 1e9 && (skip_list[0][i] == 0 || closest_endpoint[i] + 1 < skip_list[0][i])){
            skip_list[0][i] = closest_endpoint[i] + 1;
        }
    }

    for(int h = 1;h <= LGMAX;h++){
        for(int i = 1;i <= lst;i++){
            skip_list[h][i] = skip_list[h - 1][skip_list[h - 1][i]];
        }
    }

    pos.insert(0);
    pos.insert(2 * n + 3);

    int ans = get_segment_count(1,2 * n + 2);
    if(ans < k){
        printf("-1\n");
        return 0;
    }

    for(int i = 1;i <= n;i++){
        set<int> :: iterator it;
        it = pos.lower_bound(v[i].first);
        if(*it <= v[i].second || query(v[i].first)){
            continue;
        }
        int r = *it - 1;
        it--;
        int l = *it + 1;
        int local_ans = ans - get_segment_count(l,r) + get_segment_count(l,v[i].first - 1) + get_segment_count(v[i].second + 1,r);
        if(k > 0 && local_ans >= k - 1){
            k--;
            ans = local_ans;
            printf("%d\n",i);
            pos.insert(v[i].first);
            pos.insert(v[i].second);
            update(v[i].first);
            update(v[i].second + 1);
        }
    }

    return 0;
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |     scanf("%d %d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~~
event2.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |         scanf("%d %d",&v[i].first,&v[i].second);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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 336 KB Output is correct
4 Correct 188 ms 35552 KB Output is correct
5 Correct 180 ms 36804 KB Output is correct
6 Correct 177 ms 36292 KB Output is correct
7 Correct 177 ms 35320 KB Output is correct
8 Correct 183 ms 37312 KB Output is correct
9 Correct 179 ms 36796 KB Output is correct
10 Correct 184 ms 36384 KB Output is correct
11 Correct 173 ms 35236 KB Output is correct
12 Correct 150 ms 33656 KB Output is correct
13 Correct 151 ms 33384 KB Output is correct
14 Correct 151 ms 33112 KB Output is correct
15 Correct 149 ms 32460 KB Output is correct
16 Correct 112 ms 29220 KB Output is correct
17 Correct 112 ms 29092 KB Output is correct
18 Correct 114 ms 28920 KB Output is correct
19 Correct 106 ms 28304 KB Output is correct
20 Correct 110 ms 28076 KB Output is correct
21 Correct 104 ms 28100 KB Output is correct
22 Correct 113 ms 28148 KB Output is correct
23 Correct 112 ms 28012 KB Output is correct
24 Correct 112 ms 28032 KB Output is correct
25 Correct 133 ms 27400 KB Output is correct
26 Correct 134 ms 27444 KB Output is correct
27 Correct 130 ms 27444 KB Output is correct
28 Correct 101 ms 27244 KB Output is correct
29 Correct 89 ms 27204 KB Output is correct
30 Correct 92 ms 27236 KB Output is correct
31 Correct 100 ms 27268 KB Output is correct
32 Correct 110 ms 27280 KB Output is correct
33 Correct 169 ms 27172 KB Output is correct
34 Correct 146 ms 31172 KB Output is correct
35 Correct 131 ms 29828 KB Output is correct
36 Correct 126 ms 28700 KB Output is correct
37 Correct 151 ms 32964 KB Output is correct
38 Correct 154 ms 32772 KB Output is correct
39 Correct 152 ms 32580 KB Output is correct
40 Correct 148 ms 32452 KB Output is correct
41 Correct 147 ms 32068 KB Output is correct
42 Correct 95 ms 27220 KB Output is correct
43 Correct 173 ms 32760 KB Output is correct
44 Correct 141 ms 32588 KB Output is correct
45 Correct 136 ms 32324 KB Output is correct
46 Correct 132 ms 32068 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 460 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 336 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 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 332 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 336 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 332 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 0 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 460 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 336 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 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 332 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 336 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 6 ms 1100 KB Output is correct
29 Correct 4 ms 1100 KB Output is correct
30 Correct 4 ms 1100 KB Output is correct
31 Correct 4 ms 1100 KB Output is correct
32 Correct 4 ms 1100 KB Output is correct
33 Correct 4 ms 1140 KB Output is correct
34 Correct 4 ms 1100 KB Output is correct
35 Correct 6 ms 1360 KB Output is correct
36 Correct 6 ms 1356 KB Output is correct
37 Correct 6 ms 1384 KB Output is correct
38 Correct 4 ms 1100 KB Output is correct
39 Correct 6 ms 1356 KB Output is correct
40 Correct 6 ms 1356 KB Output is correct
41 Correct 6 ms 1288 KB Output is correct
42 Correct 4 ms 1100 KB Output is correct
43 Correct 5 ms 1228 KB Output is correct
44 Correct 5 ms 1228 KB Output is correct
45 Correct 5 ms 1228 KB Output is correct
46 Correct 4 ms 1100 KB Output is correct
47 Correct 6 ms 1100 KB Output is correct
48 Correct 4 ms 1100 KB Output is correct
49 Correct 4 ms 1100 KB Output is correct
50 Correct 4 ms 1104 KB Output is correct
51 Correct 4 ms 1100 KB Output is correct
52 Correct 4 ms 1100 KB Output is correct
53 Correct 4 ms 1100 KB Output is correct
54 Correct 4 ms 1100 KB Output is correct
55 Correct 6 ms 1484 KB Output is correct
56 Correct 5 ms 1404 KB Output is correct
57 Correct 5 ms 1356 KB Output is correct
58 Correct 5 ms 1356 KB Output is correct
59 Correct 5 ms 1356 KB Output is correct
60 Correct 5 ms 1356 KB Output is correct
61 Correct 5 ms 1360 KB Output is correct
62 Correct 5 ms 1356 KB Output is correct
63 Correct 5 ms 1356 KB Output is correct
64 Correct 3 ms 1104 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 336 KB Output is correct
4 Correct 188 ms 35552 KB Output is correct
5 Correct 180 ms 36804 KB Output is correct
6 Correct 177 ms 36292 KB Output is correct
7 Correct 177 ms 35320 KB Output is correct
8 Correct 183 ms 37312 KB Output is correct
9 Correct 179 ms 36796 KB Output is correct
10 Correct 184 ms 36384 KB Output is correct
11 Correct 173 ms 35236 KB Output is correct
12 Correct 150 ms 33656 KB Output is correct
13 Correct 151 ms 33384 KB Output is correct
14 Correct 151 ms 33112 KB Output is correct
15 Correct 149 ms 32460 KB Output is correct
16 Correct 112 ms 29220 KB Output is correct
17 Correct 112 ms 29092 KB Output is correct
18 Correct 114 ms 28920 KB Output is correct
19 Correct 106 ms 28304 KB Output is correct
20 Correct 110 ms 28076 KB Output is correct
21 Correct 104 ms 28100 KB Output is correct
22 Correct 113 ms 28148 KB Output is correct
23 Correct 112 ms 28012 KB Output is correct
24 Correct 112 ms 28032 KB Output is correct
25 Correct 133 ms 27400 KB Output is correct
26 Correct 134 ms 27444 KB Output is correct
27 Correct 130 ms 27444 KB Output is correct
28 Correct 101 ms 27244 KB Output is correct
29 Correct 89 ms 27204 KB Output is correct
30 Correct 92 ms 27236 KB Output is correct
31 Correct 100 ms 27268 KB Output is correct
32 Correct 110 ms 27280 KB Output is correct
33 Correct 169 ms 27172 KB Output is correct
34 Correct 146 ms 31172 KB Output is correct
35 Correct 131 ms 29828 KB Output is correct
36 Correct 126 ms 28700 KB Output is correct
37 Correct 151 ms 32964 KB Output is correct
38 Correct 154 ms 32772 KB Output is correct
39 Correct 152 ms 32580 KB Output is correct
40 Correct 148 ms 32452 KB Output is correct
41 Correct 147 ms 32068 KB Output is correct
42 Correct 95 ms 27220 KB Output is correct
43 Correct 173 ms 32760 KB Output is correct
44 Correct 141 ms 32588 KB Output is correct
45 Correct 136 ms 32324 KB Output is correct
46 Correct 132 ms 32068 KB Output is correct
47 Correct 0 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 460 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 336 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 0 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 332 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 336 KB Output is correct
68 Correct 1 ms 332 KB Output is correct
69 Correct 1 ms 344 KB Output is correct
70 Correct 1 ms 332 KB Output is correct
71 Correct 1 ms 336 KB Output is correct
72 Correct 1 ms 332 KB Output is correct
73 Correct 1 ms 332 KB Output is correct
74 Correct 6 ms 1100 KB Output is correct
75 Correct 4 ms 1100 KB Output is correct
76 Correct 4 ms 1100 KB Output is correct
77 Correct 4 ms 1100 KB Output is correct
78 Correct 4 ms 1100 KB Output is correct
79 Correct 4 ms 1140 KB Output is correct
80 Correct 4 ms 1100 KB Output is correct
81 Correct 6 ms 1360 KB Output is correct
82 Correct 6 ms 1356 KB Output is correct
83 Correct 6 ms 1384 KB Output is correct
84 Correct 4 ms 1100 KB Output is correct
85 Correct 6 ms 1356 KB Output is correct
86 Correct 6 ms 1356 KB Output is correct
87 Correct 6 ms 1288 KB Output is correct
88 Correct 4 ms 1100 KB Output is correct
89 Correct 5 ms 1228 KB Output is correct
90 Correct 5 ms 1228 KB Output is correct
91 Correct 5 ms 1228 KB Output is correct
92 Correct 4 ms 1100 KB Output is correct
93 Correct 6 ms 1100 KB Output is correct
94 Correct 4 ms 1100 KB Output is correct
95 Correct 4 ms 1100 KB Output is correct
96 Correct 4 ms 1104 KB Output is correct
97 Correct 4 ms 1100 KB Output is correct
98 Correct 4 ms 1100 KB Output is correct
99 Correct 4 ms 1100 KB Output is correct
100 Correct 4 ms 1100 KB Output is correct
101 Correct 6 ms 1484 KB Output is correct
102 Correct 5 ms 1404 KB Output is correct
103 Correct 5 ms 1356 KB Output is correct
104 Correct 5 ms 1356 KB Output is correct
105 Correct 5 ms 1356 KB Output is correct
106 Correct 5 ms 1356 KB Output is correct
107 Correct 5 ms 1360 KB Output is correct
108 Correct 5 ms 1356 KB Output is correct
109 Correct 5 ms 1356 KB Output is correct
110 Correct 3 ms 1104 KB Output is correct
111 Correct 248 ms 27980 KB Output is correct
112 Correct 266 ms 28028 KB Output is correct
113 Correct 255 ms 27968 KB Output is correct
114 Correct 275 ms 27728 KB Output is correct
115 Correct 251 ms 27512 KB Output is correct
116 Correct 234 ms 27260 KB Output is correct
117 Correct 244 ms 27264 KB Output is correct
118 Correct 355 ms 37316 KB Output is correct
119 Correct 361 ms 36456 KB Output is correct
120 Correct 294 ms 32688 KB Output is correct
121 Correct 209 ms 27332 KB Output is correct
122 Correct 326 ms 33820 KB Output is correct
123 Correct 294 ms 33192 KB Output is correct
124 Correct 299 ms 32536 KB Output is correct
125 Correct 231 ms 27248 KB Output is correct
126 Correct 254 ms 29256 KB Output is correct
127 Correct 242 ms 29124 KB Output is correct
128 Correct 275 ms 28992 KB Output is correct
129 Correct 228 ms 27256 KB Output is correct
130 Correct 273 ms 28228 KB Output is correct
131 Correct 239 ms 28228 KB Output is correct
132 Correct 235 ms 28132 KB Output is correct
133 Correct 259 ms 27204 KB Output is correct
134 Correct 252 ms 28020 KB Output is correct
135 Correct 252 ms 27972 KB Output is correct
136 Correct 241 ms 27980 KB Output is correct
137 Correct 239 ms 27324 KB Output is correct
138 Correct 234 ms 27472 KB Output is correct
139 Correct 246 ms 27500 KB Output is correct
140 Correct 247 ms 27560 KB Output is correct
141 Correct 228 ms 27204 KB Output is correct
142 Correct 197 ms 38028 KB Output is correct
143 Correct 200 ms 38120 KB Output is correct
144 Correct 192 ms 37936 KB Output is correct
145 Correct 162 ms 37788 KB Output is correct
146 Correct 165 ms 37616 KB Output is correct
147 Correct 156 ms 37396 KB Output is correct
148 Correct 195 ms 37156 KB Output is correct
149 Correct 193 ms 37028 KB Output is correct
150 Correct 155 ms 36792 KB Output is correct
151 Correct 151 ms 35652 KB Output is correct
152 Correct 95 ms 27204 KB Output is correct
153 Correct 166 ms 37848 KB Output is correct
154 Correct 164 ms 37636 KB Output is correct
155 Correct 156 ms 37444 KB Output is correct
156 Correct 159 ms 37364 KB Output is correct
157 Correct 165 ms 37108 KB Output is correct
158 Correct 159 ms 36872 KB Output is correct
159 Correct 179 ms 35864 KB Output is correct
160 Correct 88 ms 27168 KB Output is correct
161 Correct 289 ms 32956 KB Output is correct
162 Correct 313 ms 32800 KB Output is correct
163 Correct 312 ms 32620 KB Output is correct
164 Correct 347 ms 32436 KB Output is correct
165 Correct 335 ms 32200 KB Output is correct
166 Correct 95 ms 27164 KB Output is correct
167 Correct 142 ms 32764 KB Output is correct
168 Correct 142 ms 32524 KB Output is correct
169 Correct 140 ms 32324 KB Output is correct
170 Correct 154 ms 32068 KB Output is correct
171 Correct 137 ms 26180 KB Output is correct
172 Correct 147 ms 26804 KB Output is correct
173 Correct 337 ms 33076 KB Output is correct
174 Correct 315 ms 32996 KB Output is correct
175 Correct 314 ms 32940 KB Output is correct
176 Correct 286 ms 31916 KB Output is correct