oj.uz

Submission #597975

# Submission time Handle Problem Language Result Execution time Memory
597975 2022-07-17T08:47:32 Z CSQ31 Selling RNA Strands (JOI16_selling_rna) C++17
60 / 100
 1500 ms 35268 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
typedef pair<int,int> pii;
const int MOD1 = 1e9+7;
int MOD2;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
pii make_hash(string s){
	int n = s.size();
	int z1 = 5;
	int z2 = 5;
	pii hb = {0,0};
	for(int i=0;i<n;i++){
		int c = 1;
		if(s[i] == 'C')c=2;
		else if(s[i] == 'G')c=3;
		else if(s[i] == 'U')c=4;
		hb.fi += c * 1LL * z1%MOD1;
		hb.se += c * 1LL * z2%MOD2;
		if(hb.fi>=MOD1)hb.fi-=MOD1;
		if(hb.se>=MOD2)hb.se-=MOD2;
		
		z1 = z1 * 1LL * 5 %MOD1;
		z2 = z2 * 1LL * 5 %MOD2;
	}
	return hb;
}
int cmp(string &a,string &b){
	int n = a.size();
	int m = b.size();
	for(int i=0;i<n;i++){
		if(i==m)return 2;
		if(b[i] > a[i])return 0; //a is smaller 
		if(a[i] > b[i])return 2; //a is bigger
	}
	return 1;
}
const int segsz = 2e6;
int ndcnt = 0;
int cnt[segsz];
int ch[2][segsz];
int upd(int v,int pos,int l,int r){
	int nw = ++ndcnt;
	if(l==r){
		cnt[nw] = cnt[v]+1;
		return nw;
	}
	int tm = (l+r)/2;
	cnt[nw] = cnt[v]+1;
	if(pos<=tm){
		if(!ch[0][v])ch[0][v] = ++ndcnt;
		ch[1][nw] = ch[1][v];
		ch[0][nw] = upd(ch[0][v],pos,l,tm);
	}
	else{
		if(!ch[1][v])ch[1][v] = ++ndcnt;
		ch[0][nw] = ch[0][v];
		ch[1][nw] = upd(ch[1][v],pos,tm+1,r);
	}
	return nw;
}
int query(int v,int l,int r,int pos){
	//cout<<l<<" "<<r<<" "<<cnt[v]<<'\n';
	if(!v)return 0;
	if(l==r)return cnt[v];
	int tm = (l+r)/2;
	if(pos<=tm)return query(ch[0][v],l,tm,pos);
	else return query(ch[1][v],tm+1,r,pos);
	
}
int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);
	int n,m;
	cin>>n>>m;
	MOD2 = uniform_int_distribution<int>(1e8,1e9)(rng);
	vector<string>s(n);
	for(int i=0;i<n;i++)cin>>s[i];
	sort(s.begin(),s.end());
	vector<vector<pii>>sh(n); //prefix and suffix hash
	vector<pii>lab;
	for(int i=0;i<n;i++){
		int k = s[i].size();
		sh[i].resize(k);
		int z1 = 5;
		int z2 = 5;
		pii hb = {0,0};
		for(int j=0;j<k;j++){
			int c = 1;
			if(s[i][k-j-1] == 'C')c=2;
			else if(s[i][k-j-1] == 'G')c=3;
			else if(s[i][k-j-1] == 'U')c=4;
			hb.fi += c * 1LL * z1%MOD1;
			hb.se += c * 1LL * z2%MOD2;
			if(hb.fi>=MOD1)hb.fi-=MOD1;
			if(hb.se>=MOD2)hb.se-=MOD2;
			
			z1 = z1 * 1LL * 5 %MOD1;
			z2 = z2 * 1LL * 5 %MOD2;
			sh[i][j] = hb;
		}
	}
	for(int i=0;i<n;i++){
		for(pii x:sh[i])lab.push_back(x);
		
	}
	//sort(lab.begin(),lab.end());
	//lab.resize(unique(lab.begin(),lab.end()) - lab.begin());
	vector<int>root(n);
	int prev = 0;
	for(int i=0;i<n;i++){
		//cout<<i<<'\n';
		for(pii x:sh[i]){
			//prev = upd(prev,labels[x],0,labelnum-1);
		}
		root[i] = prev;
	}
	while(m--){
		
		string p,q;
		cin>>p>>q;
		reverse(q.begin(),q.end());
		pii suf = make_hash(q);
		int ans = 0;
		//binary search for borders l and r
		/*
			cout<<"comps"<<'\n';
			for(int i=0;i<n;i++)cout<<cmp(p,s[i])<<" ";
			cout<<'\n';
		*/
		//this is 2222211111000000 finding a range of 11111111
		int l = 0,r = n-1;
		while(r>=l){
			int mid = (l+r)/2;
			if(cmp(p,s[mid]) <=1 )r = mid-1; //p >= s[mid];
			else l=mid+1;
		}//first guy >= p
		int L = l;
		l = 0,r = n-1;
		while(r>=l){
			int mid = (l+r)/2;
			if(cmp(p,s[mid]) >=1)l= mid+1; //p <= s[mid]
			else r=mid-1;
			
		}
		int R = r;
		//last guy <= p
		//cout<<L<<" "<<R<<'\n';
		if(R>=L){
			//cout<<labels[suf]<<" "<<L<<" "<<R<<'\n';
			int b = q.length();
			for(int i=L;i<=R;i++)if(sh[i][b-1] == suf)ans++;
			//ans+=query(root[R],0,labelnum-1,labels[suf]);
			//if(L)ans-=query(root[L-1],0,labelnum-1,labels[suf]);
		}
		
		cout<<ans<<'\n';
		
	}
	
	
}

Compilation message

selling_rna.cpp: In function 'int main()':
selling_rna.cpp:114:11: warning: variable 'x' set but not used [-Wunused-but-set-variable]
  114 |   for(pii x:sh[i]){
      |           ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 132 ms 34684 KB Output is correct
2 Correct 197 ms 34904 KB Output is correct
3 Correct 103 ms 34792 KB Output is correct
4 Correct 98 ms 34848 KB Output is correct
5 Correct 56 ms 28220 KB Output is correct
6 Correct 54 ms 28332 KB Output is correct
7 Correct 164 ms 30188 KB Output is correct
8 Correct 98 ms 34896 KB Output is correct
9 Correct 109 ms 34860 KB Output is correct
10 Correct 264 ms 34952 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1132 ms 6028 KB Output is correct
2 Correct 470 ms 4432 KB Output is correct
3 Correct 762 ms 5364 KB Output is correct
4 Correct 273 ms 4308 KB Output is correct
5 Correct 156 ms 4436 KB Output is correct
6 Correct 220 ms 5196 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 132 ms 34684 KB Output is correct
9 Correct 197 ms 34904 KB Output is correct
10 Correct 103 ms 34792 KB Output is correct
11 Correct 98 ms 34848 KB Output is correct
12 Correct 56 ms 28220 KB Output is correct
13 Correct 54 ms 28332 KB Output is correct
14 Correct 164 ms 30188 KB Output is correct
15 Correct 98 ms 34896 KB Output is correct
16 Correct 109 ms 34860 KB Output is correct
17 Correct 264 ms 34952 KB Output is correct
18 Correct 1132 ms 6028 KB Output is correct
19 Correct 470 ms 4432 KB Output is correct
20 Correct 762 ms 5364 KB Output is correct
21 Correct 273 ms 4308 KB Output is correct
22 Correct 156 ms 4436 KB Output is correct
23 Correct 220 ms 5196 KB Output is correct
24 Correct 740 ms 35268 KB Output is correct
25 Execution timed out 1585 ms 35260 KB Time limit exceeded
26 Halted 0 ms 0 KB -