Submission #633353

#	Time	Username	Problem	Language	Result	Execution time	Memory
633353		codr0	Dabbeh (INOI20_dabbeh)	C++14	0 / 100	2096 ms	1048576 KiB

Main

// Code by Parsa Eslami

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>

#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 maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define bit(i,j) ((j>>i)&1)
#define F first
#define S second
#define dmid int mid=(r+l)/2
#define lc 2*id
#define rc 2*id+1
#define err(x) cerr<<#x<<"="<<x<<'\n'
#define pb push_back
#define SZ(x) (int)x.size()
#define all(x) x.begin(),x.end()

using namespace std;

	int lcp(string a,string b){
		FOR(j,0,min(SZ(a),SZ(b))-1) if(a[j]!=b[j]) return j;
		return min(SZ(a),SZ(b));
	}

	int32_t main(){
	iostream::sync_with_stdio(0); cin.tie(0);

	int n,m; cin>>n>>m;
	string x[n];
	FOR(i,0,n-1) cin>>x[i];
	string s; cin>>s;
	int N=SZ(s);
	string S[N];
	S[N-1]=s[N-1];
	FORR(i,N-2,0) S[i]=s[i]+S[i+1];
	int dp[N][N];
	FOR(i,0,N-1) FOR(j,0,N-1) dp[i][j]=1e9;
	FORR(l,N-1,0) FOR(r,l,N-1){
		int mx=0;
		FOR(i,0,n-1) maxm(mx,lcp(x[i],S[l]));
		if(mx+l>r) dp[l][r]=1;
		else{
			FOR(j,l+1,mx+l) minm(dp[l][r],dp[j][r]+1);
		}
	}
	while(m--){
		int l,r; cin>>l>>r;
		r--;
		if(dp[l][r]>N) dp[l][r]=-1;
		cout<<dp[l][r]<<'\n';
	}

	return 0;
	}

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