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Submission #687341

# Submission time Handle Problem Language Result Execution time Memory
687341 2023-01-26T10:21:16 Z Alcabel A Difficult(y) Choice (BOI21_books) C++17
100 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
#include <books.h>
using namespace std;

void solve(int n, int k, long long a, int s) {
    int l = -1, r = n;
    long long found = -1;
    while (r - l > 1) {
        int m = l + (r - l) / 2;
        long long cur = skim(m + 1);
        if (cur >= a) {
            found = cur;
            r = m;
        } else {
            l = m;
        }
    }
    vector<int> ans(k);
    iota(ans.begin(), ans.end(), 1);
    if (r + 1 <= k - 1) {
        impossible();
        return;
    }
    vector<long long> first(k);
    long long sumFirst = 0;
    for (int i = 0; i < k; ++i) {
        first[i] = skim(i + 1);
        sumFirst += first[i];
    }
    if (r != n && sumFirst - first.back() + found <= 2 * a) {
        ans.back() = r + 1;
        answer(ans);
        return;
    }
    n = r;
    vector<long long> last(k);
    long long sumLast = 0;
    for (int i = n - 1; i >= n - k; --i) {
        last[n - 1 - i] = skim(i + 1);
        sumLast += last[n - 1 - i];
    }
    if (sumFirst >= a && sumFirst <= 2 * a) {
        answer(ans);
        return;
    }
    if (sumLast >= a && sumLast <= 2 * a) {
        iota(ans.begin(), ans.end(), n - k + 1);
        answer(ans);
        return;
    }
    if (sumFirst > 2 * a || sumLast < a) {
        impossible();
        return;
    }
    long long sum = sumFirst;
    iota(ans.begin(), ans.end(), 1);
    for (int i = k - 1; sum < a; --i) {
        assert(i >= 0);
        sum -= first[i];
        sum += last[k - 1 - i];
        ans[i] = n - (k - 1 - i);
    }
    answer(ans);
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 1 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 0 ms 208 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 288 KB Output is correct
10 Correct 0 ms 288 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 272 KB Output is correct
13 Correct 1 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 1 ms 248 KB Output is correct
16 Correct 0 ms 208 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 208 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 292 KB Output is correct
13 Correct 1 ms 272 KB Output is correct
14 Correct 1 ms 288 KB Output is correct
15 Correct 0 ms 296 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 272 KB Output is correct
19 Correct 1 ms 292 KB Output is correct
20 Correct 1 ms 276 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 208 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 292 KB Output is correct
13 Correct 1 ms 272 KB Output is correct
14 Correct 1 ms 288 KB Output is correct
15 Correct 0 ms 296 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 272 KB Output is correct
19 Correct 1 ms 292 KB Output is correct
20 Correct 1 ms 276 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 208 KB Output is correct
27 Correct 1 ms 288 KB Output is correct
28 Correct 1 ms 208 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 1 ms 296 KB Output is correct
31 Correct 1 ms 208 KB Output is correct
32 Correct 1 ms 292 KB Output is correct
33 Correct 1 ms 292 KB Output is correct
34 Correct 1 ms 284 KB Output is correct
35 Correct 1 ms 208 KB Output is correct
36 Correct 1 ms 208 KB Output is correct
37 Correct 0 ms 272 KB Output is correct
38 Correct 1 ms 288 KB Output is correct
39 Correct 1 ms 296 KB Output is correct
40 Correct 1 ms 208 KB Output is correct
41 Correct 1 ms 292 KB Output is correct
42 Correct 1 ms 208 KB Output is correct
43 Correct 0 ms 208 KB Output is correct
44 Correct 1 ms 208 KB Output is correct
45 Correct 1 ms 208 KB Output is correct
46 Correct 1 ms 208 KB Output is correct
47 Correct 1 ms 220 KB Output is correct
48 Correct 1 ms 288 KB Output is correct
49 Correct 1 ms 288 KB Output is correct
50 Correct 1 ms 208 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 292 KB Output is correct
13 Correct 1 ms 272 KB Output is correct
14 Correct 1 ms 288 KB Output is correct
15 Correct 0 ms 296 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 272 KB Output is correct
19 Correct 1 ms 292 KB Output is correct
20 Correct 1 ms 276 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 296 KB Output is correct
27 Correct 1 ms 288 KB Output is correct
28 Correct 1 ms 292 KB Output is correct
29 Correct 1 ms 208 KB Output is correct
30 Correct 1 ms 208 KB Output is correct
31 Correct 1 ms 288 KB Output is correct
32 Correct 1 ms 296 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 1 ms 292 KB Output is correct
35 Correct 0 ms 292 KB Output is correct
36 Correct 1 ms 292 KB Output is correct
37 Correct 0 ms 208 KB Output is correct
38 Correct 1 ms 208 KB Output is correct
39 Correct 1 ms 292 KB Output is correct
40 Correct 1 ms 208 KB Output is correct
41 Correct 1 ms 208 KB Output is correct
42 Correct 1 ms 208 KB Output is correct
43 Correct 1 ms 208 KB Output is correct
44 Correct 1 ms 296 KB Output is correct
45 Correct 1 ms 300 KB Output is correct
46 Correct 1 ms 292 KB Output is correct
47 Correct 1 ms 208 KB Output is correct
48 Correct 0 ms 292 KB Output is correct
49 Correct 1 ms 208 KB Output is correct
50 Correct 0 ms 208 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 292 KB Output is correct
13 Correct 1 ms 272 KB Output is correct
14 Correct 1 ms 288 KB Output is correct
15 Correct 0 ms 296 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 272 KB Output is correct
19 Correct 1 ms 292 KB Output is correct
20 Correct 1 ms 276 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 208 KB Output is correct
27 Correct 1 ms 288 KB Output is correct
28 Correct 1 ms 208 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 1 ms 296 KB Output is correct
31 Correct 1 ms 208 KB Output is correct
32 Correct 1 ms 292 KB Output is correct
33 Correct 1 ms 292 KB Output is correct
34 Correct 1 ms 284 KB Output is correct
35 Correct 1 ms 208 KB Output is correct
36 Correct 1 ms 208 KB Output is correct
37 Correct 0 ms 272 KB Output is correct
38 Correct 1 ms 288 KB Output is correct
39 Correct 1 ms 296 KB Output is correct
40 Correct 1 ms 208 KB Output is correct
41 Correct 1 ms 292 KB Output is correct
42 Correct 1 ms 208 KB Output is correct
43 Correct 0 ms 208 KB Output is correct
44 Correct 1 ms 208 KB Output is correct
45 Correct 1 ms 208 KB Output is correct
46 Correct 1 ms 208 KB Output is correct
47 Correct 1 ms 220 KB Output is correct
48 Correct 1 ms 288 KB Output is correct
49 Correct 1 ms 288 KB Output is correct
50 Correct 1 ms 208 KB Output is correct
51 Correct 1 ms 296 KB Output is correct
52 Correct 1 ms 288 KB Output is correct
53 Correct 1 ms 292 KB Output is correct
54 Correct 1 ms 208 KB Output is correct
55 Correct 1 ms 208 KB Output is correct
56 Correct 1 ms 288 KB Output is correct
57 Correct 1 ms 296 KB Output is correct
58 Correct 1 ms 208 KB Output is correct
59 Correct 1 ms 292 KB Output is correct
60 Correct 0 ms 292 KB Output is correct
61 Correct 1 ms 292 KB Output is correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 1 ms 208 KB Output is correct
64 Correct 1 ms 292 KB Output is correct
65 Correct 1 ms 208 KB Output is correct
66 Correct 1 ms 208 KB Output is correct
67 Correct 1 ms 208 KB Output is correct
68 Correct 1 ms 208 KB Output is correct
69 Correct 1 ms 296 KB Output is correct
70 Correct 1 ms 300 KB Output is correct
71 Correct 1 ms 292 KB Output is correct
72 Correct 1 ms 208 KB Output is correct
73 Correct 0 ms 292 KB Output is correct
74 Correct 1 ms 208 KB Output is correct
75 Correct 0 ms 208 KB Output is correct
76 Correct 1 ms 208 KB Output is correct
77 Correct 1 ms 208 KB Output is correct
78 Correct 0 ms 208 KB Output is correct
79 Correct 1 ms 208 KB Output is correct
80 Correct 1 ms 208 KB Output is correct
81 Correct 1 ms 208 KB Output is correct
82 Correct 0 ms 208 KB Output is correct
83 Correct 1 ms 208 KB Output is correct
84 Correct 1 ms 208 KB Output is correct
85 Correct 0 ms 208 KB Output is correct
86 Correct 1 ms 208 KB Output is correct
87 Correct 1 ms 208 KB Output is correct
88 Correct 1 ms 208 KB Output is correct
89 Correct 1 ms 208 KB Output is correct
90 Correct 1 ms 208 KB Output is correct
91 Correct 1 ms 208 KB Output is correct
92 Correct 1 ms 208 KB Output is correct
93 Correct 1 ms 208 KB Output is correct
94 Correct 1 ms 296 KB Output is correct
95 Correct 1 ms 208 KB Output is correct
96 Correct 1 ms 208 KB Output is correct
97 Correct 0 ms 288 KB Output is correct
98 Correct 1 ms 208 KB Output is correct
99 Correct 1 ms 296 KB Output is correct
100 Correct 1 ms 208 KB Output is correct
101 Correct 1 ms 208 KB Output is correct
102 Correct 1 ms 208 KB Output is correct
103 Correct 1 ms 208 KB Output is correct
104 Correct 1 ms 208 KB Output is correct
105 Correct 1 ms 208 KB Output is correct
106 Correct 1 ms 208 KB Output is correct
107 Correct 1 ms 292 KB Output is correct
108 Correct 1 ms 208 KB Output is correct
109 Correct 1 ms 208 KB Output is correct
110 Correct 1 ms 288 KB Output is correct
111 Correct 1 ms 208 KB Output is correct
112 Correct 1 ms 296 KB Output is correct
113 Correct 1 ms 292 KB Output is correct
114 Correct 1 ms 208 KB Output is correct
115 Correct 1 ms 296 KB Output is correct
116 Correct 1 ms 296 KB Output is correct
117 Correct 1 ms 288 KB Output is correct
118 Correct 1 ms 228 KB Output is correct
119 Correct 1 ms 288 KB Output is correct
120 Correct 1 ms 208 KB Output is correct
121 Correct 1 ms 208 KB Output is correct
122 Correct 1 ms 208 KB Output is correct
123 Correct 1 ms 296 KB Output is correct
124 Correct 1 ms 348 KB Output is correct
125 Correct 1 ms 288 KB Output is correct
126 Correct 1 ms 292 KB Output is correct
127 Correct 1 ms 208 KB Output is correct
128 Correct 1 ms 208 KB Output is correct
129 Correct 1 ms 208 KB Output is correct
130 Correct 1 ms 208 KB Output is correct
131 Correct 0 ms 292 KB Output is correct
132 Correct 1 ms 208 KB Output is correct
133 Correct 1 ms 292 KB Output is correct
134 Correct 1 ms 292 KB Output is correct
135 Correct 1 ms 212 KB Output is correct