// Om Namah Shivaya
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a, b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a, b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif
/*
refs:
https://codeforces.com/blog/entry/58101?#comment-420242
*/
const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
#include "grader.h"
vector<int> findSequence (int n)
{
int zeros = 0, ones = 0;
bool flag = false;
rep1(i,n/2+1){
vector<int> v;
rep1(j,i) v.pb(0);
if(isSubsequence(v)){
zeros++;
}
else{
flag = true;
break;
}
}
if(flag){
ones = n-zeros;
}
else{
rep1(i,n/2+1){
vector<int> v;
rep1(j,i) v.pb(1);
if(isSubsequence(v)){
ones++;
}
else{
flag = true;
break;
}
}
assert(flag);
zeros = n-ones;
}
vector<int> ans(n);
int lim = n/2+1;
rep1(i,ones){
// find the pos of the ith one
// a = bef 0, b = bef 1
// c = aft 0, d = aft 1
// when fixing the ith one, we already know the values of b and d
// we know the pos of 1 if we know pair (a,d) or (b,c) (some before + some after)
// a+b+c+d = n-1
// (a+d) + (b+c) = n-1
// min(a+d, b+c) <= (n-1)/2
// min(a+d+1, b+c+1) <= (n-1)/2 + 1
int b = i-1;
int d = ones-i;
// first try (a,d)
bool found = false;
int aa = 0, cc = 0;
rep1(a,n){
if(a+d+1 > lim) break;
vector<int> v;
rep1(j,a) v.pb(0);
v.pb(1);
rep1(j,d) v.pb(1);
bool ok = isSubsequence(v);
if(ok){
aa++;
}
else{
found = true;
break;
}
}
int pos = -1;
if(found){
pos = aa + (ones-d-1);
}
else{
// try (b,c)
rep1(c,n){
if(b+c+1 > lim) break;
vector<int> v;
rep1(j,b) v.pb(1);
v.pb(1);
rep1(j,c) v.pb(0);
bool ok = isSubsequence(v);
if(ok){
cc++;
}
else{
found = true;
break;
}
}
assert(found);
pos = b + (zeros-cc);
}
ans[pos] = 1;
}
return ans;
}
Compilation message
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 |
Correct |
1 ms |
208 KB |
Output is correct: Maximum length of a query = 5 |
| 2 |
Correct |
1 ms |
208 KB |
Output is correct: Maximum length of a query = 6 |
| 3 |
Correct |
0 ms |
208 KB |
Output is correct: Maximum length of a query = 5 |
| 4 |
Runtime error |
1 ms |
464 KB |
Execution killed with signal 6 |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
3 ms |
464 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
