#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define per(i, a, b) for (int i = b - 1; i >= (a); --i)
#define trav(a, x) for (auto &a : x)
#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define pb push_back
#define umap unordered_map
#define uset unordered_set
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef long long ll;
const int INF = 1000000007;
vector<int> findSequence(int n) {
vector<int> ans(n, -1);
vi subseq;
int left[2], taken[2];
taken[0] = taken[1] = 0;
int zeros, ones, len = n / 2 + 1, small = 0, big = 1;
zeros = -1;
rep(i, 1, len + 1) {
subseq.pb(0);
if (!isSubsequence(subseq)) {
zeros = i - 1;
break;
}
}
if (zeros == -1) {
subseq.clear();
rep(i, 1, len + 1) {
subseq.pb(1);
if (!isSubsequence(subseq)) {
ones = i - 1;
break;
}
}
zeros = n - ones;
swap(small, big);
} else
ones = n - zeros;
rep(k, 0, 2) {
left[0] = zeros;
left[1] = ones;
taken[0]=taken[1]=0;
subseq.clear();
per(i, (n + 1) / 2, n) {
vi query = subseq;
int add;
query.insert(query.begin(), big);
rep(j, 0, left[small]) query.insert(query.begin(), small);
if (k) reverse(all(query));
if (sz(query) <= len) {
if (isSubsequence(query))
add = big;
else
add = small;
} else {
query.clear();
rep(j, 0, left[big]) query.pb(big);
rep(j, 0, taken[small] + 1) query.pb(small);
if (k) reverse(all(query));
if (isSubsequence(query))
add = small;
else
add = big;
}
--left[add];
++taken[add];
subseq.insert(subseq.begin(), add);
ans[k ? n - i - 1 : i] = add;
}
}
if (n & 2) {
rep(i, 0, n) if (ans[i] == 0)-- zeros;
if (zeros)
ans[n >> 1] = 0;
else
ans[n >> 1] = 1;
}
return ans;
}
Compilation message
hidden.cpp: In function 'std::vector<int> findSequence(int)':
hidden.cpp:73:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
73 | if (sz(query) <= len) {
| ^
hidden.cpp:54:15: warning: 'ones' may be used uninitialized in this function [-Wmaybe-uninitialized]
54 | zeros = n - ones;
| ~~~~~~^~~~~~~~~~
grader.cpp: In function 'int main()':
grader.cpp:28:26: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
28 | fprintf (fifo_out, "%d\n", ans.size ());
| ~^ ~~~~~~~~~~~
| | |
| int std::vector<int>::size_type {aka long unsigned int}
| %ld
grader.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
29 | for (int i=0; i<ans.size () && i < N; i++)
| ~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Partially correct |
1 ms |
200 KB |
Output is partially correct: Maximum length of a query = 6 |
| 2 |
Incorrect |
1 ms |
200 KB |
Output is not correct: The returned sequence does not match the hidden one |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
292 KB |
Output is not correct: The returned sequence contains a value different from 0 and 1 |
| 2 |
Halted |
0 ms |
0 KB |
- |
