oj.uz

Submission #771021

# Submission time Handle Problem Language Result Execution time Memory
771021 2023-07-02T10:54:47 Z parsadox2 Dabbeh (INOI20_dabbeh) C++14
25 / 100
 2000 ms 200212 KB 
#include <bits/stdc++.h>
#define pb 		push_back
#define F		first
#define S 		second
#define debug(x)    cout << #x << "= " << x << ", "
#define ll 		long long
#define fast 		ios::sync_with_stdio(false), cin.tie(0),  cout.tie(0)
#define SZ(x)         (int) x.size()
#define wall 		cout << endl;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 3e5 + 10 , mod = 1e9 + 7 , Base = 131 , maxl = 20;
int n , m , L , pw[maxn] , prehsh[maxn] , tree[maxl][maxn << 2] , rr[maxn] , ans[maxn] , tof[maxn];
map <int , int> marked;
pair<int , int> ar[maxn];
string s;
vector <pair<int , int>> vec[maxn];

int modit(int a)
{
	if(a >= mod)  a -= mod;
	return a;
}

int get(int l , int r)
{
	if(l == 0)  return  prehsh[r];
	int tmp = 1LL * prehsh[l - 1] * pw[r - l + 1] % mod;
	int res = modit(prehsh[r] + mod - tmp);
	return res;
}

void Build(int ty , int node = 1 , int nl = 0 , int nr = maxn)
{
	tree[ty][node] = -1;
	if(nl + 1 == nr)  return;
	int mid = (nl + nr) >> 1 , lc = node << 1 , rc = lc | 1;
	Build(ty , lc , nl , mid);  Build(ty , rc , mid , nr);
}

void Add(int ty , int l , int r , int val , int node = 1 , int nl = 0 , int nr = maxn)
{
	if(r <= nl || nr <= l)  return;
	if(l <= nl && nr <= r)
	{
		tree[ty][node] = val;
		return;
	}
	int mid = (nl + nr) >> 1 , lc = node << 1 , rc = lc | 1;
	if(tree[ty][node] != -1)
	{
		tree[ty][lc] = tree[ty][node];
		tree[ty][rc] = tree[ty][node];
		tree[ty][node] = -1;
	}
	Add(ty , l , r , val , lc , nl , mid);  Add(ty , l , r ,val , rc , mid , nr);
}

int Get(int ty , int ind , int node = 1 , int nl = 0 , int nr = maxn)
{
	if(tree[ty][node] != -1)  return  tree[ty][node];
	assert(nl + 1 != nr);
	int mid = (nl + nr) >> 1 , lc = node << 1 , rc = lc | 1;
	if(ind < mid)  return Get(ty , ind , lc , nl , mid);
	else  return Get(ty , ind , rc , mid , nr);
}

int solve(int l , int r)
{
	if(Get(maxl - 1 , l) < r)  return -1;
	int low = 0 , high = (1 << (maxl - 1));
	while(high - low > 1)
	{
		int mid = (high + low) >> 1;
		int tmp = l;
		for(int i = 0 ; i < maxl ; i++)  if((mid >> i) & 1)  tmp = Get(i , tmp);
		if(tmp < r)  low = mid;
		else  high = mid;
	}
	return high;
}

int32_t main()
{
	fast;
	for(int i = 0 ; i < maxl ; i++)  Build(i);
	pw[0] = 1;
	for(int i = 1 ; i < maxn ; i++)  pw[i] = 1LL * pw[i - 1] * Base % mod;

	cin >> n >> m;
	for(int i = 0 ; i < n ; i++)
	{
		string t;  cin >> t;
		int hsh = 0;
		int tmp = t[0] - 'a' + 1;
		tof[tmp] = 1;
		for(int j = 0 ; j < SZ(t) ; j++)
		{
			hsh = 1LL * hsh * Base % mod;
			hsh = modit(hsh + (t[j] - 'a' + 1));
			marked[hsh] = true;
		}
	}
	marked[0] = true;
	cin >> s;
	L = SZ(s);
	for(int i = 0 ; i < m ; i++)  cin >> ar[i].F >> ar[i].S;

	prehsh[0] = s[0] - 'a' + 1;
	for(int i = 1 ; i < L ; i++)
	{
		int now = s[i] - 'a' + 1;
		prehsh[i] = 1LL * prehsh[i - 1] * Base % mod;
		prehsh[i] = modit(prehsh[i] + now);
	}
	for(int i = 0 ; i < L ; i++)
	{
		int salam = s[i] - 'a' + 1;
		if(tof[salam] != 1)
		{
			rr[i] = i;
			continue;
		}
		int low = i , high = L;
		while(high - low > 1)
		{
			int mid = (high + low) >> 1;
			if(marked[get(i , mid)] && marked[get(i , mid - 1)])  low = mid;
			else  high = mid;
		}
		rr[i] = high;
	}
	for(int i = 0 ; i < maxl ; i++)  Add(i , L , L + 1 , L);
	for(int i = 0 ; i < m ; i++)  vec[ar[i].F].pb({i , ar[i].S});

	for(int i = L - 1 ; i > -1 ; i--)
	{
		int low = i , high = L;
		while(high - low > 1)
		{
			int mid = (high + low) >> 1;
			if(Get(0 , mid) < rr[i])
				low = mid;
			else 
				high = mid;
		}
		Add(0 , i , high , rr[i]);
		for(int j = 1 ; j < maxl ; j++)
		{
			int tmp = Get(j - 1 , i);
			tmp = Get(j - 1 , tmp);
			Add(j , i , high , tmp);
		}
		for(auto u : vec[i])
			ans[u.F] = solve(i , u.S);
	}
	for(int i = 0 ; i < m ; i++)  cout << ans[i] << '\n';
	return 0;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 90616 KB Output is correct
2 Correct 491 ms 115968 KB Output is correct
3 Correct 461 ms 111128 KB Output is correct
4 Correct 526 ms 116192 KB Output is correct
5 Correct 520 ms 114488 KB Output is correct
6 Correct 553 ms 118860 KB Output is correct
7 Correct 612 ms 121288 KB Output is correct
8 Correct 589 ms 120264 KB Output is correct
9 Correct 503 ms 117980 KB Output is correct
10 Correct 357 ms 103300 KB Output is correct
11 Correct 468 ms 118956 KB Output is correct
12 Correct 356 ms 108292 KB Output is correct
13 Correct 415 ms 114184 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2060 ms 200212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 90616 KB Output is correct
2 Correct 491 ms 115968 KB Output is correct
3 Correct 461 ms 111128 KB Output is correct
4 Correct 526 ms 116192 KB Output is correct
5 Correct 520 ms 114488 KB Output is correct
6 Correct 553 ms 118860 KB Output is correct
7 Correct 612 ms 121288 KB Output is correct
8 Correct 589 ms 120264 KB Output is correct
9 Correct 503 ms 117980 KB Output is correct
10 Correct 357 ms 103300 KB Output is correct
11 Correct 468 ms 118956 KB Output is correct
12 Correct 356 ms 108292 KB Output is correct
13 Correct 415 ms 114184 KB Output is correct
14 Execution timed out 2060 ms 200212 KB Time limit exceeded
15 Halted 0 ms 0 KB -