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답안 #746775

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
746775 2023-05-23T04:59:51 Z nguyentunglam Event Hopping 2 (JOI21_event2) C++17
100 / 100
 274 ms 15912 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define endl "\n"
#define ii pair<int, int>
using namespace std;
const int N = 1e5 + 10;
pair<int, int> a[N];
vector<pair<int, int> > line, tmp;
int f[20][N], lg;
int get(int x) {
    return lower_bound(line.begin(), line.end(), make_pair(x, 0)) - line.begin();
}
int calc(int l, int r) {
    int u = get(l), ret = 0;
    for(int j = lg; j >= 0; j--) if (f[j][u] > 0 && f[j][u] <= r) {
        u = get(f[j][u]);
        ret += 1 << j;
    }
    return ret;
}
int main() {
    #define task ""
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen ("task.inp", "r")) {
        freopen ("task.inp", "r", stdin);
        freopen ("task.out", "w", stdout);
    }
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int n, k; cin >> n >> k;
    lg = log2(n);
    for(int i = 1; i <= n; i++) {
        cin >> a[i].first >> a[i].second;
        line.push_back(a[i]);
    }
    sort(line.begin(), line.end(), [] (const ii &x, const ii &y) {
         if (x.fi != y.fi) return x.fi < y.fi;
         return x.se > y.se;
         });
    int pre = 1e9;
    for(int i = line.size() - 1; ~i; i--) {
        int l, r; tie(l, r) = line[i];
        if (r < pre) {
            pre = r;
            tmp.push_back(line[i]);
        }
    }
    reverse(tmp.begin(), tmp.end());
    line = tmp;
    int m = line.size();
    for(int i = 0; i < m; i++) f[0][i] = line[i].second;
    for(int j = 1; j <= lg; j++) for(int i = 0; i < m; i++) {
        if (f[j - 1][i]) f[j][i] = f[j - 1][get(f[j - 1][i])];
    }


    set<pair<int, int> > s;
    s.insert({1, 1e9});
    int cur = calc(1, 1e9);
    int cnt = 0;
    if (cur < k) return cout << -1, 0;
    for(int i = 1; i <= n && cnt < k; i++) {
        auto it = s.upper_bound(make_pair(a[i].first, 1e9));
        if (it == s.begin()) continue;
        it--;
        if (it -> second < a[i].second) continue;
        int l, r; tie(l, r) = *it;
        int tmp = calc(l, a[i].first) + calc(a[i].second, r) + 1 - calc(l, r) + cur;
        if (tmp >= k) {
            s.erase(it);
            if (l < a[i].first) s.insert({l, a[i].first});
            if (a[i].second < r) s.insert({a[i].second, r});
            cout << i << endl;
            cnt++;
            cur = tmp;
        }
    }
}

Compilation message

event2.cpp: In function 'int main()':
event2.cpp:26:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen ("task.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
event2.cpp:27:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen ("task.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
event2.cpp:30:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
event2.cpp:31:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 260 ms 15792 KB Output is correct
5 Correct 244 ms 15652 KB Output is correct
6 Correct 245 ms 15440 KB Output is correct
7 Correct 226 ms 14984 KB Output is correct
8 Correct 261 ms 15844 KB Output is correct
9 Correct 249 ms 15628 KB Output is correct
10 Correct 240 ms 15332 KB Output is correct
11 Correct 245 ms 14860 KB Output is correct
12 Correct 193 ms 13260 KB Output is correct
13 Correct 183 ms 13240 KB Output is correct
14 Correct 178 ms 12996 KB Output is correct
15 Correct 176 ms 12644 KB Output is correct
16 Correct 82 ms 7880 KB Output is correct
17 Correct 76 ms 7816 KB Output is correct
18 Correct 74 ms 7776 KB Output is correct
19 Correct 40 ms 5044 KB Output is correct
20 Correct 35 ms 4936 KB Output is correct
21 Correct 32 ms 4932 KB Output is correct
22 Correct 27 ms 4056 KB Output is correct
23 Correct 26 ms 4156 KB Output is correct
24 Correct 27 ms 4160 KB Output is correct
25 Correct 25 ms 3936 KB Output is correct
26 Correct 25 ms 3988 KB Output is correct
27 Correct 24 ms 3944 KB Output is correct
28 Correct 96 ms 11096 KB Output is correct
29 Correct 93 ms 10404 KB Output is correct
30 Correct 54 ms 7672 KB Output is correct
31 Correct 31 ms 4936 KB Output is correct
32 Correct 26 ms 4172 KB Output is correct
33 Correct 25 ms 4012 KB Output is correct
34 Correct 159 ms 12140 KB Output is correct
35 Correct 136 ms 11440 KB Output is correct
36 Correct 119 ms 10940 KB Output is correct
37 Correct 146 ms 10012 KB Output is correct
38 Correct 136 ms 9784 KB Output is correct
39 Correct 139 ms 9680 KB Output is correct
40 Correct 140 ms 9608 KB Output is correct
41 Correct 128 ms 9480 KB Output is correct
42 Correct 65 ms 7776 KB Output is correct
43 Correct 142 ms 9780 KB Output is correct
44 Correct 140 ms 9760 KB Output is correct
45 Correct 132 ms 9612 KB Output is correct
46 Correct 145 ms 9544 KB Output is correct

Subtask #2
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 468 KB Output is correct
29 Correct 2 ms 476 KB Output is correct
30 Correct 2 ms 476 KB Output is correct
31 Correct 2 ms 484 KB Output is correct
32 Correct 2 ms 468 KB Output is correct
33 Correct 2 ms 468 KB Output is correct
34 Correct 2 ms 476 KB Output is correct
35 Correct 7 ms 740 KB Output is correct
36 Correct 6 ms 724 KB Output is correct
37 Correct 5 ms 724 KB Output is correct
38 Correct 3 ms 596 KB Output is correct
39 Correct 6 ms 740 KB Output is correct
40 Correct 6 ms 728 KB Output is correct
41 Correct 5 ms 724 KB Output is correct
42 Correct 3 ms 596 KB Output is correct
43 Correct 4 ms 612 KB Output is correct
44 Correct 4 ms 588 KB Output is correct
45 Correct 3 ms 612 KB Output is correct
46 Correct 3 ms 572 KB Output is correct
47 Correct 2 ms 468 KB Output is correct
48 Correct 2 ms 480 KB Output is correct
49 Correct 2 ms 468 KB Output is correct
50 Correct 2 ms 468 KB Output is correct
51 Correct 2 ms 480 KB Output is correct
52 Correct 2 ms 484 KB Output is correct
53 Correct 2 ms 468 KB Output is correct
54 Correct 1 ms 404 KB Output is correct
55 Correct 5 ms 596 KB Output is correct
56 Correct 5 ms 596 KB Output is correct
57 Correct 5 ms 596 KB Output is correct
58 Correct 6 ms 668 KB Output is correct
59 Correct 5 ms 736 KB Output is correct
60 Correct 5 ms 596 KB Output is correct
61 Correct 5 ms 608 KB Output is correct
62 Correct 5 ms 596 KB Output is correct
63 Correct 5 ms 664 KB Output is correct
64 Correct 3 ms 596 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 260 ms 15792 KB Output is correct
5 Correct 244 ms 15652 KB Output is correct
6 Correct 245 ms 15440 KB Output is correct
7 Correct 226 ms 14984 KB Output is correct
8 Correct 261 ms 15844 KB Output is correct
9 Correct 249 ms 15628 KB Output is correct
10 Correct 240 ms 15332 KB Output is correct
11 Correct 245 ms 14860 KB Output is correct
12 Correct 193 ms 13260 KB Output is correct
13 Correct 183 ms 13240 KB Output is correct
14 Correct 178 ms 12996 KB Output is correct
15 Correct 176 ms 12644 KB Output is correct
16 Correct 82 ms 7880 KB Output is correct
17 Correct 76 ms 7816 KB Output is correct
18 Correct 74 ms 7776 KB Output is correct
19 Correct 40 ms 5044 KB Output is correct
20 Correct 35 ms 4936 KB Output is correct
21 Correct 32 ms 4932 KB Output is correct
22 Correct 27 ms 4056 KB Output is correct
23 Correct 26 ms 4156 KB Output is correct
24 Correct 27 ms 4160 KB Output is correct
25 Correct 25 ms 3936 KB Output is correct
26 Correct 25 ms 3988 KB Output is correct
27 Correct 24 ms 3944 KB Output is correct
28 Correct 96 ms 11096 KB Output is correct
29 Correct 93 ms 10404 KB Output is correct
30 Correct 54 ms 7672 KB Output is correct
31 Correct 31 ms 4936 KB Output is correct
32 Correct 26 ms 4172 KB Output is correct
33 Correct 25 ms 4012 KB Output is correct
34 Correct 159 ms 12140 KB Output is correct
35 Correct 136 ms 11440 KB Output is correct
36 Correct 119 ms 10940 KB Output is correct
37 Correct 146 ms 10012 KB Output is correct
38 Correct 136 ms 9784 KB Output is correct
39 Correct 139 ms 9680 KB Output is correct
40 Correct 140 ms 9608 KB Output is correct
41 Correct 128 ms 9480 KB Output is correct
42 Correct 65 ms 7776 KB Output is correct
43 Correct 142 ms 9780 KB Output is correct
44 Correct 140 ms 9760 KB Output is correct
45 Correct 132 ms 9612 KB Output is correct
46 Correct 145 ms 9544 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 336 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 ms 336 KB Output is correct
56 Correct 1 ms 336 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 0 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 1 ms 344 KB Output is correct
62 Correct 1 ms 332 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 1 ms 340 KB Output is correct
65 Correct 1 ms 340 KB Output is correct
66 Correct 1 ms 340 KB Output is correct
67 Correct 1 ms 340 KB Output is correct
68 Correct 1 ms 340 KB Output is correct
69 Correct 1 ms 340 KB Output is correct
70 Correct 1 ms 340 KB Output is correct
71 Correct 1 ms 348 KB Output is correct
72 Correct 1 ms 340 KB Output is correct
73 Correct 1 ms 340 KB Output is correct
74 Correct 2 ms 468 KB Output is correct
75 Correct 2 ms 476 KB Output is correct
76 Correct 2 ms 476 KB Output is correct
77 Correct 2 ms 484 KB Output is correct
78 Correct 2 ms 468 KB Output is correct
79 Correct 2 ms 468 KB Output is correct
80 Correct 2 ms 476 KB Output is correct
81 Correct 7 ms 740 KB Output is correct
82 Correct 6 ms 724 KB Output is correct
83 Correct 5 ms 724 KB Output is correct
84 Correct 3 ms 596 KB Output is correct
85 Correct 6 ms 740 KB Output is correct
86 Correct 6 ms 728 KB Output is correct
87 Correct 5 ms 724 KB Output is correct
88 Correct 3 ms 596 KB Output is correct
89 Correct 4 ms 612 KB Output is correct
90 Correct 4 ms 588 KB Output is correct
91 Correct 3 ms 612 KB Output is correct
92 Correct 3 ms 572 KB Output is correct
93 Correct 2 ms 468 KB Output is correct
94 Correct 2 ms 480 KB Output is correct
95 Correct 2 ms 468 KB Output is correct
96 Correct 2 ms 468 KB Output is correct
97 Correct 2 ms 480 KB Output is correct
98 Correct 2 ms 484 KB Output is correct
99 Correct 2 ms 468 KB Output is correct
100 Correct 1 ms 404 KB Output is correct
101 Correct 5 ms 596 KB Output is correct
102 Correct 5 ms 596 KB Output is correct
103 Correct 5 ms 596 KB Output is correct
104 Correct 6 ms 668 KB Output is correct
105 Correct 5 ms 736 KB Output is correct
106 Correct 5 ms 596 KB Output is correct
107 Correct 5 ms 608 KB Output is correct
108 Correct 5 ms 596 KB Output is correct
109 Correct 5 ms 664 KB Output is correct
110 Correct 3 ms 596 KB Output is correct
111 Correct 35 ms 3940 KB Output is correct
112 Correct 43 ms 4032 KB Output is correct
113 Correct 45 ms 3936 KB Output is correct
114 Correct 35 ms 4032 KB Output is correct
115 Correct 30 ms 3912 KB Output is correct
116 Correct 32 ms 4040 KB Output is correct
117 Correct 29 ms 3920 KB Output is correct
118 Correct 274 ms 15912 KB Output is correct
119 Correct 267 ms 15328 KB Output is correct
120 Correct 179 ms 12680 KB Output is correct
121 Correct 98 ms 10400 KB Output is correct
122 Correct 208 ms 13304 KB Output is correct
123 Correct 211 ms 13052 KB Output is correct
124 Correct 185 ms 12820 KB Output is correct
125 Correct 102 ms 10436 KB Output is correct
126 Correct 101 ms 7820 KB Output is correct
127 Correct 92 ms 7800 KB Output is correct
128 Correct 91 ms 7748 KB Output is correct
129 Correct 60 ms 7720 KB Output is correct
130 Correct 55 ms 5036 KB Output is correct
131 Correct 50 ms 4936 KB Output is correct
132 Correct 50 ms 5036 KB Output is correct
133 Correct 36 ms 4968 KB Output is correct
134 Correct 45 ms 4116 KB Output is correct
135 Correct 41 ms 4232 KB Output is correct
136 Correct 35 ms 4088 KB Output is correct
137 Correct 31 ms 4108 KB Output is correct
138 Correct 33 ms 3956 KB Output is correct
139 Correct 31 ms 3988 KB Output is correct
140 Correct 29 ms 4024 KB Output is correct
141 Correct 32 ms 4036 KB Output is correct
142 Correct 238 ms 11676 KB Output is correct
143 Correct 233 ms 11712 KB Output is correct
144 Correct 234 ms 11800 KB Output is correct
145 Correct 237 ms 11676 KB Output is correct
146 Correct 232 ms 11680 KB Output is correct
147 Correct 232 ms 11644 KB Output is correct
148 Correct 236 ms 11684 KB Output is correct
149 Correct 225 ms 11632 KB Output is correct
150 Correct 230 ms 11600 KB Output is correct
151 Correct 216 ms 11604 KB Output is correct
152 Correct 107 ms 11084 KB Output is correct
153 Correct 231 ms 11804 KB Output is correct
154 Correct 229 ms 11684 KB Output is correct
155 Correct 233 ms 11748 KB Output is correct
156 Correct 231 ms 11736 KB Output is correct
157 Correct 227 ms 11632 KB Output is correct
158 Correct 224 ms 11624 KB Output is correct
159 Correct 210 ms 11520 KB Output is correct
160 Correct 107 ms 11264 KB Output is correct
161 Correct 188 ms 12852 KB Output is correct
162 Correct 190 ms 12696 KB Output is correct
163 Correct 185 ms 12672 KB Output is correct
164 Correct 183 ms 12684 KB Output is correct
165 Correct 182 ms 12544 KB Output is correct
166 Correct 68 ms 7808 KB Output is correct
167 Correct 149 ms 9828 KB Output is correct
168 Correct 140 ms 9800 KB Output is correct
169 Correct 134 ms 9604 KB Output is correct
170 Correct 129 ms 9464 KB Output is correct
171 Correct 178 ms 12704 KB Output is correct
172 Correct 158 ms 13392 KB Output is correct
173 Correct 196 ms 11672 KB Output is correct
174 Correct 213 ms 11548 KB Output is correct
175 Correct 195 ms 11632 KB Output is correct
176 Correct 177 ms 11768 KB Output is correct