Submission #398560

#	Time	Username	Problem	Language	Result	Execution time	Memory
398560		keta_tsimakuridze	Selling RNA Strands (JOI16_selling_rna)	C++14	35 / 100	418 ms	106920 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],cur,all;
vector<pair<int,pair<int,int> > >Q[N],P[N];
map<int,int> cnt;
vector<int>ind[N];
string s[N],s1[N];
vector<pair<int,pair<int,int> > > a;
vector<pair<pair<int,int>,pair<int,int> > > c[N];
pair<pair<int,int>,pair<int,int> >  p[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;
}
void CountSort(){
	for(int i=0;i<=all;i++){
		c[i].clear();
	}
	for(int i=1;i<=all;i++){
		c[p[i].f.s].push_back(p[i]);
	}
	int cur=0;
	for(int i=0;i<=all;i++){
		
		for(int j=0;j<c[i].size();j++){
			cur++;
			p[cur]=c[i][j];
		}
	}
	//
	for(int i=0;i<=all;i++){
		c[i].clear();
	}
	for(int i=1;i<=all;i++){
		c[p[i].f.f].push_back(p[i]);
	}
	 cur=0;
	for(int i=0;i<=all;i++){
		
		for(int j=0;j<c[i].size();j++){
			cur++;
			p[cur]=c[i][j];
		}
	}
}
 main(){
 	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	// t=1;
	cin >> n >> m;
	int mx = 0;
	for(int i=1;i<=n;i++){
		cin >> s[i];
		ind[i].resize(s[i].size());
		for(int j=0;j<s[i].size();j++){
			a.push_back({s[i][j]-'a',{i,j}});
		}
		mx=max(mx,(int)s[i].size());
		all+=(int)s[i].size();
	}
	int pr = 37;
	pwr[0] = 1;
	for(int i=1;i<=mx;i++){
		pwr[i]=pwr[i-1]*pr%mod;
	}
	// sort(s+1,s+n+1);	 ?? 
	sort(a.begin(),a.end());
	int cur = 0;
	for(int i=0;i<a.size();i++){
		if(!i || a[i].f!=a[i-1].f) cur++;
		ind[a[i].s.f][a[i].s.s] = cur;
	}
	int Lg=log2(mx) + 1;
	for(int i=1;i<=Lg;i++){cur = 0; 
		for(int j=1;j<=n;j++){
			for(int k=0;k<s[j].size();k++){ 
				int ind2=0;
				cur++;
				if(k+(1<<(i-1)) < s[j].size()) ind2=ind[j][k+(1<<(i-1))];
				p[cur]={{ind[j][k],ind2},{j,k}};
		
			}
		}
			CountSort();
			cur = 0;
			for(int j=1;j<=all;j++){
			
				if(p[j].f.f!=p[j-1].f.f || p[j].f.s!=p[j-1].f.s) cur++;
				ind[p[j].s.f][p[j].s.s]=cur;
			}
		
		
	}
	a.clear();
	for(int i=1;i<=n;i++) {
		a.push_back({ind[i][0],{i,0}});
		s1[i]=s[i];
		
	}
	sort(a.begin(),a.end());
	cur=0;
	for(int i=0;i<n;i++){
		s[i+1] = s1[a[i].s.f];
	}
	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="";
			int F = 0, F2 = 0;
			for(int j=0;j<min((int)pref.size(),(int)s[mid].size());j++){
				if(s[mid][j] < pref[j]) {
					F=1; break;
				}
				else if(s[mid][j]>pref[j]) {
					F2=1; break;
				}
			}
			if(!F2 && (F || (int)s[mid].size() <(int) pref.size())) {
				L = mid;
				l=mid+1;
			}
			else r=mid-1;
		}
		
		l=1; r=n;
		while(l<=r){
			int mid=(l+r)/2;
			string sb="";
			int F = 0, F2 = 0;
			for(int j=0;j<min((int)pref.size(),(int)s[mid].size());j++){
				sb+=s[mid][j];
				if(s[mid][j] < pref[j]) {
					F=1; break;
				}
				else if(s[mid][j]>pref[j]) {
					F2=1; break;
				}
			}
			if(F2 ) {
				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:17:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~
selling_rna.cpp: In function 'void CountSort()':
selling_rna.cpp:33:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   for(int j=0;j<c[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:48:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   for(int j=0;j<c[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp: At global scope:
selling_rna.cpp:54:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   54 |  main(){
      |       ^
selling_rna.cpp: In function 'int main()':
selling_rna.cpp:62:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   for(int j=0;j<s[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:76:15: 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]
   76 |  for(int i=0;i<a.size();i++){
      |              ~^~~~~~~~~
selling_rna.cpp:83:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |    for(int k=0;k<s[j].size();k++){
      |                ~^~~~~~~~~~~~
selling_rna.cpp:86:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     if(k+(1<<(i-1)) < s[j].size()) ind2=ind[j][k+(1<<(i-1))];
      |        ~~~~~~~~~~~~~^~~~~~~~~~~~~
selling_rna.cpp:140:8: warning: variable 'F' set but not used [-Wunused-but-set-variable]
  140 |    int F = 0, F2 = 0;
      |        ^
selling_rna.cpp:161:16: 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]
  161 |   for(int j=0;j<P[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:165:16: 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]
  165 |   for(int j=0;j<Q[i].size();j++){
      |               ~^~~~~~~~~~~~
selling_rna.cpp:159:7: warning: unused variable 'cur' [-Wunused-variable]
  159 |   int cur=0;
      |       ^~~

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