Submission #633506

#	Time	Username	Problem	Language	Result	Execution time	Memory
633506		MatBad	Dabbeh (INOI20_dabbeh)	C++14	25 / 100	270 ms	52616 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i=a; i<=b; i++)
#define FORR(i, a, b) for(int i=a; i>=b; i--)
#define pb push_back
#define ppb pop_back
#define lc 2*u
#define rc 2*u+1
#define mid ((l+r)/2)
#define F first
#define S second
#define debug(x) cerr<<"$ "<<#x<<" : "<<x<<"$\n"
#define wall() cerr<<"\n----------------------\n"

typedef long long ll;
typedef pair<int, int> pii;

const ll MX=505, M=5e5+5, LG=19, inf=1e9+5, MOD=1e9+7, A=27;

int m, n, tr[M][A], N, dp[MX][MX];
string s;

void add(string& t){
	int v=0;
	FOR(i, 0, (int)t.size()-1){
		if(!tr[v][t[i]-'a']) tr[v][t[i]-'a'] = ++N; 
		v = tr[v][t[i]-'a'];
	}
}

int main(){
	ios::sync_with_stdio(0); cin.tie(0);
	cin>>n>>m;
	FOR(i, 1, n){
		string t;
		cin>>t;
		add(t);
	}
	cin>>s;
	int L=s.size();
	FORR(i, L-1, 0) FOR(j, i, L-1){
		dp[i][j]=inf;
		for(int v=tr[0][s[i]-'a'], h=1; v!=0 and i+h<=L; v=tr[v][s[i+h]-'a'], h++){
			dp[i][j]=min(dp[i][j], 1+dp[i+h][j]);
		}
	}
	
	FOR(q, 1, m){
		int l, r;
		cin>>l>>r;
		r--;
		//l--; r--;
		cout<<(dp[l][r]==inf?-1:dp[l][r])<<'\n';
	}
}

• Subtask 1: 25 / 25
• Subtask 2: 0 / 25
• Subtask 3: 0 / 50