oj.uz

Submission #525906

# Submission time Handle Problem Language Result Execution time Memory
525906 2022-02-13T06:52:15 Z Qingyu A Difficult(y) Choice (BOI21_books) C++17
100 / 100
 2 ms 1092 KB 
#include <bits/stdc++.h>

#include "books.h"

using namespace std;
//
// --- Sample implementation for the task books ---
//
// To compile this program with the sample grader, place:
//     books.h books_sample.cpp sample_grader.cpp
// in a single folder and run:
//     g++ books_sample.cpp sample_grader.cpp
// in this folder.
//

void solve(int N, int K, long long A, int S) {
	auto ok = [&](long long x) -> bool {
		return A <= x && x <= 2 * A;
	};
	vector<long long> X(N + 1, -1);
	auto get = [&](int k) -> long long {
		if (X[k] == -1) X[k] = skim(k);
		return X[k];
	};
	long long total = 0;
	for (int i = 1; i <= K; ++i) {
		total += get(i);	
	}
	if (total > 2 * A) {
		impossible();
		return;
	}
	if (total >= A) {
		vector<int> v;
		for (int i = 1; i <= K; ++i) v.push_back(i);
		answer(v);
		return;
	}
	int l = K, r = N, ans = -1;
	while (l <= r) {
		const int mid = l + r >> 1;
		if (X[mid] == -1) X[mid] = skim(mid);
		if (X[mid] < A) ans = mid, l = mid + 1;
		else r = mid - 1;
	}
	if (ans < N) {
		total = 0;
		for (int i = 1; i < K; ++i) total += get(i);
		total += get(ans + 1);
		assert(total >= A);
		if (total <= 2 * A) {
			vector<int> v;
			for (int i = 1; i < K; ++i) v.push_back(i);
			v.push_back(ans + 1);
			answer(v);
			return;
		}
	}
	if (ans - K + 1 <= K) {
		for (int j = K + 1; j <= ans; ++j)
			X[j] = skim(j);
		auto Y = X;
		for (int i = 1; i <= ans; ++i) Y[i] += Y[i - 1];
		for (int i = K; i <= ans; ++i)
			if (ok(Y[i] - Y[i - K])) {
				vector<int> v;
				for (int j = i - K + 1; j <= i; ++j)
					v.push_back(j);
				answer(v);
				return;
			}
		impossible();
		return;
	}
	for (int i = ans - K + 1; i <= ans; ++i)
		if (X[i] == -1)
			X[i] = skim(i);
	total = 0;
	for (int i = 1; i <= K; ++i) total += X[i];

	for (int j = 1; j <= K; ++j) {
		total -= X[j];
		total += X[ans - K + j];
		if (ok(total)) {
			vector<int> v;
			for (int t = j + 1; t <= K; ++t) v.push_back(t);
			for (int t = 1; t <= j; ++t)
				v.push_back(ans - K + t);
			answer(v);
			return;
		}
	}
	impossible();
	return;
}

Compilation message

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:41:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |   const int mid = l + r >> 1;
      |                   ~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 288 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 200 KB Output is correct
6 Correct 1 ms 200 KB Output is correct
7 Correct 1 ms 200 KB Output is correct
8 Correct 1 ms 288 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 276 KB Output is correct
4 Correct 1 ms 200 KB Output is correct
5 Correct 1 ms 200 KB Output is correct
6 Correct 1 ms 200 KB Output is correct
7 Correct 1 ms 200 KB Output is correct
8 Correct 0 ms 200 KB Output is correct
9 Correct 1 ms 456 KB Output is correct
10 Correct 1 ms 416 KB Output is correct
11 Correct 1 ms 456 KB Output is correct
12 Correct 1 ms 392 KB Output is correct
13 Correct 1 ms 448 KB Output is correct
14 Correct 1 ms 456 KB Output is correct
15 Correct 1 ms 392 KB Output is correct
16 Correct 1 ms 456 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 960 KB Output is correct
2 Correct 1 ms 1040 KB Output is correct
3 Correct 1 ms 1040 KB Output is correct
4 Correct 1 ms 1040 KB Output is correct
5 Correct 1 ms 956 KB Output is correct
6 Correct 1 ms 968 KB Output is correct
7 Correct 1 ms 1032 KB Output is correct
8 Correct 1 ms 960 KB Output is correct
9 Correct 1 ms 1048 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 960 KB Output is correct
2 Correct 1 ms 1040 KB Output is correct
3 Correct 1 ms 1040 KB Output is correct
4 Correct 1 ms 1040 KB Output is correct
5 Correct 1 ms 956 KB Output is correct
6 Correct 1 ms 968 KB Output is correct
7 Correct 1 ms 1032 KB Output is correct
8 Correct 1 ms 960 KB Output is correct
9 Correct 1 ms 1048 KB Output is correct
10 Correct 1 ms 1028 KB Output is correct
11 Correct 2 ms 968 KB Output is correct
12 Correct 1 ms 1028 KB Output is correct
13 Correct 1 ms 1040 KB Output is correct
14 Correct 1 ms 1056 KB Output is correct
15 Correct 1 ms 1048 KB Output is correct
16 Correct 1 ms 1028 KB Output is correct
17 Correct 1 ms 1052 KB Output is correct
18 Correct 1 ms 968 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1028 KB Output is correct
21 Correct 1 ms 1008 KB Output is correct
22 Correct 1 ms 1036 KB Output is correct
23 Correct 1 ms 968 KB Output is correct
24 Correct 1 ms 1052 KB Output is correct
25 Correct 2 ms 1048 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 960 KB Output is correct
2 Correct 1 ms 1040 KB Output is correct
3 Correct 1 ms 1040 KB Output is correct
4 Correct 1 ms 1040 KB Output is correct
5 Correct 1 ms 956 KB Output is correct
6 Correct 1 ms 968 KB Output is correct
7 Correct 1 ms 1032 KB Output is correct
8 Correct 1 ms 960 KB Output is correct
9 Correct 1 ms 1048 KB Output is correct
10 Correct 1 ms 1028 KB Output is correct
11 Correct 2 ms 968 KB Output is correct
12 Correct 1 ms 1028 KB Output is correct
13 Correct 1 ms 1040 KB Output is correct
14 Correct 1 ms 1056 KB Output is correct
15 Correct 1 ms 1048 KB Output is correct
16 Correct 1 ms 1028 KB Output is correct
17 Correct 1 ms 1052 KB Output is correct
18 Correct 1 ms 968 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1028 KB Output is correct
21 Correct 1 ms 1008 KB Output is correct
22 Correct 1 ms 1036 KB Output is correct
23 Correct 1 ms 968 KB Output is correct
24 Correct 1 ms 1052 KB Output is correct
25 Correct 2 ms 1048 KB Output is correct
26 Correct 1 ms 1040 KB Output is correct
27 Correct 1 ms 968 KB Output is correct
28 Correct 1 ms 1048 KB Output is correct
29 Correct 1 ms 968 KB Output is correct
30 Correct 1 ms 1056 KB Output is correct
31 Correct 1 ms 1056 KB Output is correct
32 Correct 1 ms 1040 KB Output is correct
33 Correct 1 ms 1052 KB Output is correct
34 Correct 1 ms 1036 KB Output is correct
35 Correct 1 ms 1028 KB Output is correct
36 Correct 1 ms 1048 KB Output is correct
37 Correct 1 ms 960 KB Output is correct
38 Correct 1 ms 1056 KB Output is correct
39 Correct 1 ms 1052 KB Output is correct
40 Correct 1 ms 1040 KB Output is correct
41 Correct 1 ms 1048 KB Output is correct
42 Correct 1 ms 1044 KB Output is correct
43 Correct 1 ms 1044 KB Output is correct
44 Correct 1 ms 1052 KB Output is correct
45 Correct 1 ms 1040 KB Output is correct
46 Correct 1 ms 968 KB Output is correct
47 Correct 1 ms 1044 KB Output is correct
48 Correct 1 ms 1044 KB Output is correct
49 Correct 1 ms 1048 KB Output is correct
50 Correct 1 ms 968 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 960 KB Output is correct
2 Correct 1 ms 1040 KB Output is correct
3 Correct 1 ms 1040 KB Output is correct
4 Correct 1 ms 1040 KB Output is correct
5 Correct 1 ms 956 KB Output is correct
6 Correct 1 ms 968 KB Output is correct
7 Correct 1 ms 1032 KB Output is correct
8 Correct 1 ms 960 KB Output is correct
9 Correct 1 ms 1048 KB Output is correct
10 Correct 1 ms 1028 KB Output is correct
11 Correct 2 ms 968 KB Output is correct
12 Correct 1 ms 1028 KB Output is correct
13 Correct 1 ms 1040 KB Output is correct
14 Correct 1 ms 1056 KB Output is correct
15 Correct 1 ms 1048 KB Output is correct
16 Correct 1 ms 1028 KB Output is correct
17 Correct 1 ms 1052 KB Output is correct
18 Correct 1 ms 968 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1028 KB Output is correct
21 Correct 1 ms 1008 KB Output is correct
22 Correct 1 ms 1036 KB Output is correct
23 Correct 1 ms 968 KB Output is correct
24 Correct 1 ms 1052 KB Output is correct
25 Correct 2 ms 1048 KB Output is correct
26 Correct 1 ms 1048 KB Output is correct
27 Correct 1 ms 968 KB Output is correct
28 Correct 1 ms 1032 KB Output is correct
29 Correct 1 ms 960 KB Output is correct
30 Correct 1 ms 960 KB Output is correct
31 Correct 1 ms 1048 KB Output is correct
32 Correct 1 ms 960 KB Output is correct
33 Correct 1 ms 1048 KB Output is correct
34 Correct 1 ms 1048 KB Output is correct
35 Correct 1 ms 1028 KB Output is correct
36 Correct 1 ms 1052 KB Output is correct
37 Correct 1 ms 1028 KB Output is correct
38 Correct 1 ms 1040 KB Output is correct
39 Correct 1 ms 960 KB Output is correct
40 Correct 1 ms 1044 KB Output is correct
41 Correct 1 ms 1032 KB Output is correct
42 Correct 1 ms 1040 KB Output is correct
43 Correct 1 ms 960 KB Output is correct
44 Correct 1 ms 1092 KB Output is correct
45 Correct 1 ms 1052 KB Output is correct
46 Correct 1 ms 1044 KB Output is correct
47 Correct 1 ms 968 KB Output is correct
48 Correct 1 ms 1040 KB Output is correct
49 Correct 1 ms 1052 KB Output is correct
50 Correct 1 ms 968 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 960 KB Output is correct
2 Correct 1 ms 1040 KB Output is correct
3 Correct 1 ms 1040 KB Output is correct
4 Correct 1 ms 1040 KB Output is correct
5 Correct 1 ms 956 KB Output is correct
6 Correct 1 ms 968 KB Output is correct
7 Correct 1 ms 1032 KB Output is correct
8 Correct 1 ms 960 KB Output is correct
9 Correct 1 ms 1048 KB Output is correct
10 Correct 1 ms 1028 KB Output is correct
11 Correct 2 ms 968 KB Output is correct
12 Correct 1 ms 1028 KB Output is correct
13 Correct 1 ms 1040 KB Output is correct
14 Correct 1 ms 1056 KB Output is correct
15 Correct 1 ms 1048 KB Output is correct
16 Correct 1 ms 1028 KB Output is correct
17 Correct 1 ms 1052 KB Output is correct
18 Correct 1 ms 968 KB Output is correct
19 Correct 1 ms 1052 KB Output is correct
20 Correct 1 ms 1028 KB Output is correct
21 Correct 1 ms 1008 KB Output is correct
22 Correct 1 ms 1036 KB Output is correct
23 Correct 1 ms 968 KB Output is correct
24 Correct 1 ms 1052 KB Output is correct
25 Correct 2 ms 1048 KB Output is correct
26 Correct 1 ms 1040 KB Output is correct
27 Correct 1 ms 968 KB Output is correct
28 Correct 1 ms 1048 KB Output is correct
29 Correct 1 ms 968 KB Output is correct
30 Correct 1 ms 1056 KB Output is correct
31 Correct 1 ms 1056 KB Output is correct
32 Correct 1 ms 1040 KB Output is correct
33 Correct 1 ms 1052 KB Output is correct
34 Correct 1 ms 1036 KB Output is correct
35 Correct 1 ms 1028 KB Output is correct
36 Correct 1 ms 1048 KB Output is correct
37 Correct 1 ms 960 KB Output is correct
38 Correct 1 ms 1056 KB Output is correct
39 Correct 1 ms 1052 KB Output is correct
40 Correct 1 ms 1040 KB Output is correct
41 Correct 1 ms 1048 KB Output is correct
42 Correct 1 ms 1044 KB Output is correct
43 Correct 1 ms 1044 KB Output is correct
44 Correct 1 ms 1052 KB Output is correct
45 Correct 1 ms 1040 KB Output is correct
46 Correct 1 ms 968 KB Output is correct
47 Correct 1 ms 1044 KB Output is correct
48 Correct 1 ms 1044 KB Output is correct
49 Correct 1 ms 1048 KB Output is correct
50 Correct 1 ms 968 KB Output is correct
51 Correct 1 ms 1048 KB Output is correct
52 Correct 1 ms 968 KB Output is correct
53 Correct 1 ms 1032 KB Output is correct
54 Correct 1 ms 960 KB Output is correct
55 Correct 1 ms 960 KB Output is correct
56 Correct 1 ms 1048 KB Output is correct
57 Correct 1 ms 960 KB Output is correct
58 Correct 1 ms 1048 KB Output is correct
59 Correct 1 ms 1048 KB Output is correct
60 Correct 1 ms 1028 KB Output is correct
61 Correct 1 ms 1052 KB Output is correct
62 Correct 1 ms 1028 KB Output is correct
63 Correct 1 ms 1040 KB Output is correct
64 Correct 1 ms 960 KB Output is correct
65 Correct 1 ms 1044 KB Output is correct
66 Correct 1 ms 1032 KB Output is correct
67 Correct 1 ms 1040 KB Output is correct
68 Correct 1 ms 960 KB Output is correct
69 Correct 1 ms 1092 KB Output is correct
70 Correct 1 ms 1052 KB Output is correct
71 Correct 1 ms 1044 KB Output is correct
72 Correct 1 ms 968 KB Output is correct
73 Correct 1 ms 1040 KB Output is correct
74 Correct 1 ms 1052 KB Output is correct
75 Correct 1 ms 968 KB Output is correct
76 Correct 1 ms 200 KB Output is correct
77 Correct 1 ms 200 KB Output is correct
78 Correct 1 ms 200 KB Output is correct
79 Correct 0 ms 200 KB Output is correct
80 Correct 0 ms 200 KB Output is correct
81 Correct 0 ms 288 KB Output is correct
82 Correct 0 ms 200 KB Output is correct
83 Correct 1 ms 200 KB Output is correct
84 Correct 1 ms 456 KB Output is correct
85 Correct 1 ms 456 KB Output is correct
86 Correct 1 ms 456 KB Output is correct
87 Correct 1 ms 408 KB Output is correct
88 Correct 1 ms 456 KB Output is correct
89 Correct 1 ms 456 KB Output is correct
90 Correct 1 ms 412 KB Output is correct
91 Correct 1 ms 456 KB Output is correct
92 Correct 1 ms 968 KB Output is correct
93 Correct 1 ms 1044 KB Output is correct
94 Correct 1 ms 964 KB Output is correct
95 Correct 1 ms 1044 KB Output is correct
96 Correct 1 ms 1040 KB Output is correct
97 Correct 1 ms 1048 KB Output is correct
98 Correct 1 ms 1040 KB Output is correct
99 Correct 1 ms 1048 KB Output is correct
100 Correct 1 ms 1028 KB Output is correct
101 Correct 1 ms 1044 KB Output is correct
102 Correct 1 ms 1048 KB Output is correct
103 Correct 1 ms 1044 KB Output is correct
104 Correct 1 ms 968 KB Output is correct
105 Correct 1 ms 1048 KB Output is correct
106 Correct 1 ms 968 KB Output is correct
107 Correct 1 ms 1048 KB Output is correct
108 Correct 1 ms 1044 KB Output is correct
109 Correct 1 ms 1040 KB Output is correct
110 Correct 1 ms 968 KB Output is correct
111 Correct 1 ms 960 KB Output is correct
112 Correct 1 ms 1052 KB Output is correct
113 Correct 1 ms 1040 KB Output is correct
114 Correct 1 ms 968 KB Output is correct
115 Correct 1 ms 968 KB Output is correct
116 Correct 1 ms 1048 KB Output is correct
117 Correct 1 ms 1028 KB Output is correct
118 Correct 1 ms 1048 KB Output is correct
119 Correct 1 ms 968 KB Output is correct
120 Correct 1 ms 960 KB Output is correct
121 Correct 1 ms 1052 KB Output is correct
122 Correct 1 ms 1032 KB Output is correct
123 Correct 1 ms 968 KB Output is correct
124 Correct 1 ms 1052 KB Output is correct
125 Correct 1 ms 968 KB Output is correct
126 Correct 1 ms 960 KB Output is correct
127 Correct 1 ms 1044 KB Output is correct
128 Correct 1 ms 1028 KB Output is correct
129 Correct 1 ms 1044 KB Output is correct
130 Correct 1 ms 1040 KB Output is correct
131 Correct 1 ms 960 KB Output is correct
132 Correct 1 ms 1044 KB Output is correct
133 Correct 1 ms 1028 KB Output is correct
134 Correct 1 ms 964 KB Output is correct
135 Correct 1 ms 1036 KB Output is correct