Submission #398533

#	Time	Username	Problem	Language	Result	Execution time	Memory
398533		keta_tsimakuridze	Selling RNA Strands (JOI16_selling_rna)	C++14	35 / 100	1571 ms	63348 KiB

selling_rna

#include<bits/stdc++.h>
#define f first
#define s second
using namespace std;
const int N=1e5+5,mod=1e9+7;
int t,n,m,pwr[N],ans[N];
vector<pair<int,pair<int,int> > >Q[N],P[N];
map<int,int> cnt;
string s[N];
int gethash(string s,int f){
	reverse(s.begin(),s.end());
	int cur = 0;
	for(int i=0;i<s.size();i++){
		cur=cur+pwr[i]*(s[i]-'a'+1); cur%=mod;
		if(f) cnt[cur]++;
	}
	return cur;
}
 main(){
	// t=1;
	cin >> n >> m;
	int mx = 0;
	for(int i=1;i<=n;i++){
		cin >> s[i];
		mx=max(mx,(int)s[i].size());
	}
	int p = 37;
	pwr[0] = 1;
	for(int i=1;i<=mx;i++){
		pwr[i]=pwr[i-1]*p%mod;
	}
	sort(s+1,s+n+1);	
	string pref,suff;
	for(int i=1;i<=m;i++){
	
		cin>>pref>>suff;
		int l=1,r=n,L=0,R=n+1;
		while(l<=r){
			int mid=(l+r)/2;
			string sb="";
			for(int j=0;j<min((int)pref.size(),(int)s[mid].size());j++){
				sb+=s[mid][j];
			}
			if(sb < pref ) {
				L = mid;
				l=mid+1;
			}
			else r=mid-1;
		}
		
		l=1; r=n;
		while(l<=r){
			int mid=(l+r)/2;
			string sb="";
			for(int j=0;j<min((int)pref.size(),(int)s[mid].size());j++){
				sb+=s[mid][j];
			}
			if(sb > pref ) {
				R = mid;
				r=mid-1;
			}
			else l=mid+1;			
		}
		P[L+1].push_back({R-1,{i,gethash(suff,0)}});
	}
	for(int i=1;i<=n;i++){
		int cur=0;
		
		for(int j=0;j<P[i].size();j++){
			Q[P[i][j].f].push_back({cnt[P[i][j].s.s],P[i][j].s});
		}
		gethash(s[i],1);
		for(int j=0;j<Q[i].size();j++){
			ans[Q[i][j].s.f] =cnt[Q[i][j].s.s]-Q[i][j].f; 
		}
	}
	for(int i=1;i<=m;i++){
		cout<<ans[i]<<" ";
	}
}

Compilation message (stderr)

selling_rna.cpp: In function 'int gethash(std::string, int)':
selling_rna.cpp:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~
selling_rna.cpp: At global scope:
selling_rna.cpp:19:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   19 |  main(){
      |       ^
selling_rna.cpp: In function 'int main()':
selling_rna.cpp:69:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |   for(int j=0;j<P[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:73:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |   for(int j=0;j<Q[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:67:7: warning: unused variable 'cur' [-Wunused-variable]
   67 |   int cur=0;
      |       ^~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 25
• Subtask 3: 25 / 25
• Subtask 4: 0 / 40