Submission #349302

#	Time	Username	Problem	Language	Result	Execution time	Memory
349302		silverfish	Matching (CEOI11_mat)	C++14	63 / 100	573 ms	65540 KiB

mat

#include <bits/stdc++.h>
//#pragma GCC optimize("Ofast,unroll-loops")

using namespace std;

/*<DEBUG>*/
#define tem template <typename 
#define can_shift(_X_, ...) enable_if_t<sizeof test<_X_>(0) __VA_ARGS__ 8, debug&> operator<<(T i)
#define _op debug& operator<<
tem C > auto test(C *x) -> decltype(cerr << *x, 0LL);
tem C > char test(...);
tem C > struct itr{C begin, end; };
tem C > itr<C> get_range(C b, C e) { return itr<C>{b, e}; }
struct debug{
#ifdef _LOCAL
	~debug(){ cerr << endl; }
	tem T > can_shift(T, ==){ cerr << boolalpha << i; return *this; }
	tem T> can_shift(T, !=){ return *this << get_range(begin(i), end(i)); }
	tem T, typename U > _op (pair<T, U> i){ 
		return *this << "< " << i.first << " , " << i.second << " >"; }
	tem T> _op (itr<T> i){
		*this <<  "{ ";
		for(auto it = i.begin; it != i.end; it++){
			*this << " , " + (it==i.begin?2:0) << *it;
		}
		return *this << " }";
	}
#else
tem T> _op (const T&) { return *this; }
#endif 
};

string _ARR_(int* arr, int sz){
	string ret = "{ " + to_string(arr[0]); 
	for(int i = 1; i < sz; i++) ret += " , " +  to_string(arr[i]);
	ret += " }"; return ret;
}

#define exp(...) " [ " << #__VA_ARGS__ << " : " << (__VA_ARGS__) << " ]"
/*</DEBUG>*/

typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef pair<int, int> pii;
//mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

#define pb push_back
#define FAST ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define TC int __TC__; cin >> __TC__; while(__TC__--)
#define ar array

const int INF = 1e9 + 7, N = 1e6;

int p[2*N+1], pi[2*N+1];

struct Node{
	Node (){}
	int *data;
	Node *left, *right;
};

Node *root;

int n, m;

//start of merge sort tree

void build(int lx, int rx, Node *x){
	x->data = new int[rx-lx+1];

	if(lx == rx){
		x->data[0] = p[lx];
		return;
	}

	int m = lx + (rx - lx+1)/2;
	x->left = new Node;
	x->right = new Node;
	build(lx, m-1, x->left);
	build(m, rx, x->right);

	//merge
	
	merge(x->left->data, x->left->data + (m-1 -lx + 1), x->right->data, x->right->data + (rx - m + 1), 
			x->data);
	return;
}

int get(int lx, int rx, Node* x, int l, int r, int v){
	
	if(lx >= l && rx <= r){
		return (lower_bound(x->data, x->data + (rx - lx + 1), v) - x->data);
	}

	if(r < lx || l > rx) return 0;

	int m = lx + (rx - lx+1) / 2;
	return get(lx, m-1, x->left, l, r, v) + get(m, rx, x->right, l, r, v);
}

int get(int l, int r){
	if(l==r) return 0;
	return get(0, n+m, root, l, r-1, p[r]);
}

int main(void)
{
	FAST;

	cin >> n >> m;

	for(int i = 0; i < n; ++i){
		int x; cin >> x;
		p[--x] = i+1;
	}


	p[n] = -1;
	for(int i = n+1; i <= n+m; ++i){
		cin >> p[i];
		p[i] += n;
	}

	// build merge sort tree

	root = new Node;
	build(0, n+m, root);

	pi[0] = 0;
	int cnt = 0;
	vector<int> ans;

	for(int i = 1; i <= n+m; ++i){
		int j = pi[i-1];
		if(j == n) j = pi[j-1];

		while(j > 0 && get(0, j) != get(i-j, i)){
			j = pi[j-1];
		}

		if(get(0,j) == get(i - j, i)) ++j;
		pi[i] = j;

		if(p[i] == -1) pi[i] = 0;

		if(pi[i] == n){
			++cnt;
			ans.pb(i-n-n);
		}
	}

	cout << cnt << '\n';
	for(int i : ans) cout << i+1 << ' ';
	cout << '\n';

	return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 8
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10