#include <iostream>
#include <vector>
#include <set>
using namespace std;
#include "books.h"
int findA(vector<long long>& books, long long A, int lower, int upper) {
if (books[lower] == -1) {
books[lower] = skim(lower + 1);
}
if (books[upper] == -1) {
books[upper] = skim(upper + 1);
}
if (books[lower] > A) {
return -1;
}
if (books[upper] <= A) {
return upper;
}
if (upper - lower < 2) {
return lower;
}
int half = (upper - lower + 1) / 2;
books[lower + half] = skim(lower + half + 1);
if (books[lower + half] <= A) return findA(books, A, lower + half, upper);
else return findA(books, A, lower, lower + half);
}
void solve(int N, int K, long long A, int S) {
if (K > N) {
impossible();
return;
}
vector<long long> books(N);
for (int i = 0; i < N; i++) {
books[i] = -1;
}
long long sumFirstK = 0;
for (int i = 0; i < K; i++) {
if (books[i] == -1) {
books[i] = skim(i + 1);
}
sumFirstK += books[i];
}
if (sumFirstK > A * 2) {
impossible();
}
else {
vector<int> res;
for (int i = 0; i < K; i++) {
res.push_back(i + 1);
}
if (sumFirstK >= A) {
answer(res);
}
else {
// sumFirstK < A
// find last element < A
long long posA = findA(books, A, 0, N - 1);
long long currentSum = sumFirstK;
// try to replace with largest values < A
for (int i = 0; i < K; i++) {
if (posA - i < 0) {
break;
}
if (books[posA - i] == -1) {
books[posA - i] = skim(posA - i + 1);
}
currentSum -= books[K - 1 - i];
res[K - 1 - i] = posA - i + 1;
currentSum += books[posA - i];
if ((currentSum >= A) && (currentSum <= 2 * A)) {
// check that no book appears twice
set<int> validator;
for (int j = 0; j < K; j++) {
validator.insert(res[j]);
}
if (validator.size() == K) {
answer(res);
}
break;
}
}
// failed to build the sum with elements < A only
// need to look at elements > A
int j = 0;
while ((j < K) && ((posA + 1 + j) < N)) {
if (books[posA + j + 1] == -1) {
books[posA + j + 1] = skim(posA + j + 2);
}
sumFirstK -= books[K - j - 1];
res[K - j - 1] = posA + j + 2;
sumFirstK += books[posA + j + 1];
if (sumFirstK > A * 2) {
impossible();
break;
}
else {
if (sumFirstK >= A) {
set<int> validator;
for (int l = 0; l < K; l++) {
validator.insert(res[l]);
}
if (validator.size() == K) {
answer(res);
}
else {
impossible();
}
break;
}
}
++j;
}
impossible();
}
}
return;
}
Compilation message
books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:85:27: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
85 | if (validator.size() == K) {
| ~~~~~~~~~~~~~~~~~^~~~
books.cpp:112:28: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
112 | if (validator.size() == K) {
| ~~~~~~~~~~~~~~~~~^~~~
# |
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 |
200 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 |
204 KB |
Output is correct |
7 |
Incorrect |
2 ms |
200 KB |
Incorrect |
8 |
Halted |
0 ms |
0 KB |
- |
# |
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 |
200 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 |
Incorrect |
1 ms |
200 KB |
Incorrect |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
968 KB |
Output is correct |
2 |
Correct |
2 ms |
968 KB |
Output is correct |
3 |
Correct |
2 ms |
968 KB |
Output is correct |
4 |
Correct |
2 ms |
968 KB |
Output is correct |
5 |
Correct |
2 ms |
1096 KB |
Output is correct |
6 |
Correct |
1 ms |
968 KB |
Output is correct |
7 |
Correct |
2 ms |
968 KB |
Output is correct |
8 |
Correct |
2 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
968 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
968 KB |
Output is correct |
2 |
Correct |
2 ms |
968 KB |
Output is correct |
3 |
Correct |
2 ms |
968 KB |
Output is correct |
4 |
Correct |
2 ms |
968 KB |
Output is correct |
5 |
Correct |
2 ms |
1096 KB |
Output is correct |
6 |
Correct |
1 ms |
968 KB |
Output is correct |
7 |
Correct |
2 ms |
968 KB |
Output is correct |
8 |
Correct |
2 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
968 KB |
Output is correct |
10 |
Correct |
2 ms |
968 KB |
Output is correct |
11 |
Correct |
3 ms |
968 KB |
Output is correct |
12 |
Correct |
3 ms |
968 KB |
Output is correct |
13 |
Correct |
1 ms |
968 KB |
Output is correct |
14 |
Correct |
1 ms |
968 KB |
Output is correct |
15 |
Correct |
1 ms |
968 KB |
Output is correct |
16 |
Correct |
1 ms |
968 KB |
Output is correct |
17 |
Correct |
2 ms |
972 KB |
Output is correct |
18 |
Correct |
2 ms |
968 KB |
Output is correct |
19 |
Correct |
2 ms |
968 KB |
Output is correct |
20 |
Correct |
2 ms |
968 KB |
Output is correct |
21 |
Correct |
1 ms |
968 KB |
Output is correct |
22 |
Correct |
2 ms |
968 KB |
Output is correct |
23 |
Correct |
3 ms |
968 KB |
Output is correct |
24 |
Correct |
2 ms |
968 KB |
Output is correct |
25 |
Correct |
3 ms |
968 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
968 KB |
Output is correct |
2 |
Correct |
2 ms |
968 KB |
Output is correct |
3 |
Correct |
2 ms |
968 KB |
Output is correct |
4 |
Correct |
2 ms |
968 KB |
Output is correct |
5 |
Correct |
2 ms |
1096 KB |
Output is correct |
6 |
Correct |
1 ms |
968 KB |
Output is correct |
7 |
Correct |
2 ms |
968 KB |
Output is correct |
8 |
Correct |
2 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
968 KB |
Output is correct |
10 |
Correct |
2 ms |
968 KB |
Output is correct |
11 |
Correct |
3 ms |
968 KB |
Output is correct |
12 |
Correct |
3 ms |
968 KB |
Output is correct |
13 |
Correct |
1 ms |
968 KB |
Output is correct |
14 |
Correct |
1 ms |
968 KB |
Output is correct |
15 |
Correct |
1 ms |
968 KB |
Output is correct |
16 |
Correct |
1 ms |
968 KB |
Output is correct |
17 |
Correct |
2 ms |
972 KB |
Output is correct |
18 |
Correct |
2 ms |
968 KB |
Output is correct |
19 |
Correct |
2 ms |
968 KB |
Output is correct |
20 |
Correct |
2 ms |
968 KB |
Output is correct |
21 |
Correct |
1 ms |
968 KB |
Output is correct |
22 |
Correct |
2 ms |
968 KB |
Output is correct |
23 |
Correct |
3 ms |
968 KB |
Output is correct |
24 |
Correct |
2 ms |
968 KB |
Output is correct |
25 |
Correct |
3 ms |
968 KB |
Output is correct |
26 |
Correct |
2 ms |
1096 KB |
Output is correct |
27 |
Correct |
2 ms |
988 KB |
Output is correct |
28 |
Correct |
2 ms |
968 KB |
Output is correct |
29 |
Correct |
1 ms |
968 KB |
Output is correct |
30 |
Correct |
2 ms |
968 KB |
Output is correct |
31 |
Correct |
2 ms |
968 KB |
Output is correct |
32 |
Correct |
2 ms |
968 KB |
Output is correct |
33 |
Correct |
1 ms |
972 KB |
Output is correct |
34 |
Correct |
1 ms |
972 KB |
Output is correct |
35 |
Correct |
2 ms |
968 KB |
Output is correct |
36 |
Correct |
1 ms |
968 KB |
Output is correct |
37 |
Correct |
2 ms |
968 KB |
Output is correct |
38 |
Correct |
1 ms |
972 KB |
Output is correct |
39 |
Correct |
2 ms |
968 KB |
Output is correct |
40 |
Correct |
2 ms |
968 KB |
Output is correct |
41 |
Correct |
2 ms |
968 KB |
Output is correct |
42 |
Correct |
1 ms |
968 KB |
Output is correct |
43 |
Correct |
1 ms |
968 KB |
Output is correct |
44 |
Correct |
2 ms |
968 KB |
Output is correct |
45 |
Correct |
2 ms |
992 KB |
Output is correct |
46 |
Correct |
2 ms |
968 KB |
Output is correct |
47 |
Correct |
2 ms |
968 KB |
Output is correct |
48 |
Correct |
2 ms |
968 KB |
Output is correct |
49 |
Incorrect |
2 ms |
968 KB |
Incorrect |
50 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
968 KB |
Output is correct |
2 |
Correct |
2 ms |
968 KB |
Output is correct |
3 |
Correct |
2 ms |
968 KB |
Output is correct |
4 |
Correct |
2 ms |
968 KB |
Output is correct |
5 |
Correct |
2 ms |
1096 KB |
Output is correct |
6 |
Correct |
1 ms |
968 KB |
Output is correct |
7 |
Correct |
2 ms |
968 KB |
Output is correct |
8 |
Correct |
2 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
968 KB |
Output is correct |
10 |
Correct |
2 ms |
968 KB |
Output is correct |
11 |
Correct |
3 ms |
968 KB |
Output is correct |
12 |
Correct |
3 ms |
968 KB |
Output is correct |
13 |
Correct |
1 ms |
968 KB |
Output is correct |
14 |
Correct |
1 ms |
968 KB |
Output is correct |
15 |
Correct |
1 ms |
968 KB |
Output is correct |
16 |
Correct |
1 ms |
968 KB |
Output is correct |
17 |
Correct |
2 ms |
972 KB |
Output is correct |
18 |
Correct |
2 ms |
968 KB |
Output is correct |
19 |
Correct |
2 ms |
968 KB |
Output is correct |
20 |
Correct |
2 ms |
968 KB |
Output is correct |
21 |
Correct |
1 ms |
968 KB |
Output is correct |
22 |
Correct |
2 ms |
968 KB |
Output is correct |
23 |
Correct |
3 ms |
968 KB |
Output is correct |
24 |
Correct |
2 ms |
968 KB |
Output is correct |
25 |
Correct |
3 ms |
968 KB |
Output is correct |
26 |
Correct |
2 ms |
968 KB |
Output is correct |
27 |
Correct |
2 ms |
968 KB |
Output is correct |
28 |
Correct |
2 ms |
968 KB |
Output is correct |
29 |
Correct |
1 ms |
968 KB |
Output is correct |
30 |
Correct |
2 ms |
968 KB |
Output is correct |
31 |
Correct |
1 ms |
968 KB |
Output is correct |
32 |
Correct |
1 ms |
972 KB |
Output is correct |
33 |
Correct |
2 ms |
968 KB |
Output is correct |
34 |
Correct |
2 ms |
968 KB |
Output is correct |
35 |
Correct |
2 ms |
968 KB |
Output is correct |
36 |
Correct |
2 ms |
968 KB |
Output is correct |
37 |
Correct |
2 ms |
968 KB |
Output is correct |
38 |
Correct |
2 ms |
972 KB |
Output is correct |
39 |
Correct |
2 ms |
972 KB |
Output is correct |
40 |
Correct |
2 ms |
972 KB |
Output is correct |
41 |
Correct |
2 ms |
968 KB |
Output is correct |
42 |
Correct |
2 ms |
968 KB |
Output is correct |
43 |
Correct |
2 ms |
968 KB |
Output is correct |
44 |
Correct |
1 ms |
968 KB |
Output is correct |
45 |
Correct |
1 ms |
968 KB |
Output is correct |
46 |
Correct |
2 ms |
968 KB |
Output is correct |
47 |
Correct |
2 ms |
972 KB |
Output is correct |
48 |
Correct |
2 ms |
968 KB |
Output is correct |
49 |
Correct |
2 ms |
1096 KB |
Output is correct |
50 |
Correct |
2 ms |
968 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
968 KB |
Output is correct |
2 |
Correct |
2 ms |
968 KB |
Output is correct |
3 |
Correct |
2 ms |
968 KB |
Output is correct |
4 |
Correct |
2 ms |
968 KB |
Output is correct |
5 |
Correct |
2 ms |
1096 KB |
Output is correct |
6 |
Correct |
1 ms |
968 KB |
Output is correct |
7 |
Correct |
2 ms |
968 KB |
Output is correct |
8 |
Correct |
2 ms |
972 KB |
Output is correct |
9 |
Correct |
2 ms |
968 KB |
Output is correct |
10 |
Correct |
2 ms |
968 KB |
Output is correct |
11 |
Correct |
3 ms |
968 KB |
Output is correct |
12 |
Correct |
3 ms |
968 KB |
Output is correct |
13 |
Correct |
1 ms |
968 KB |
Output is correct |
14 |
Correct |
1 ms |
968 KB |
Output is correct |
15 |
Correct |
1 ms |
968 KB |
Output is correct |
16 |
Correct |
1 ms |
968 KB |
Output is correct |
17 |
Correct |
2 ms |
972 KB |
Output is correct |
18 |
Correct |
2 ms |
968 KB |
Output is correct |
19 |
Correct |
2 ms |
968 KB |
Output is correct |
20 |
Correct |
2 ms |
968 KB |
Output is correct |
21 |
Correct |
1 ms |
968 KB |
Output is correct |
22 |
Correct |
2 ms |
968 KB |
Output is correct |
23 |
Correct |
3 ms |
968 KB |
Output is correct |
24 |
Correct |
2 ms |
968 KB |
Output is correct |
25 |
Correct |
3 ms |
968 KB |
Output is correct |
26 |
Correct |
2 ms |
1096 KB |
Output is correct |
27 |
Correct |
2 ms |
988 KB |
Output is correct |
28 |
Correct |
2 ms |
968 KB |
Output is correct |
29 |
Correct |
1 ms |
968 KB |
Output is correct |
30 |
Correct |
2 ms |
968 KB |
Output is correct |
31 |
Correct |
2 ms |
968 KB |
Output is correct |
32 |
Correct |
2 ms |
968 KB |
Output is correct |
33 |
Correct |
1 ms |
972 KB |
Output is correct |
34 |
Correct |
1 ms |
972 KB |
Output is correct |
35 |
Correct |
2 ms |
968 KB |
Output is correct |
36 |
Correct |
1 ms |
968 KB |
Output is correct |
37 |
Correct |
2 ms |
968 KB |
Output is correct |
38 |
Correct |
1 ms |
972 KB |
Output is correct |
39 |
Correct |
2 ms |
968 KB |
Output is correct |
40 |
Correct |
2 ms |
968 KB |
Output is correct |
41 |
Correct |
2 ms |
968 KB |
Output is correct |
42 |
Correct |
1 ms |
968 KB |
Output is correct |
43 |
Correct |
1 ms |
968 KB |
Output is correct |
44 |
Correct |
2 ms |
968 KB |
Output is correct |
45 |
Correct |
2 ms |
992 KB |
Output is correct |
46 |
Correct |
2 ms |
968 KB |
Output is correct |
47 |
Correct |
2 ms |
968 KB |
Output is correct |
48 |
Correct |
2 ms |
968 KB |
Output is correct |
49 |
Incorrect |
2 ms |
968 KB |
Incorrect |
50 |
Halted |
0 ms |
0 KB |
- |